Now and then around the threads, I'll come across the odd word and immediately think "I haven't got a clue what you're talking about". Few and far between fortunately, but often the search function or standard dictionaries are of no help, and I'm sure others share this experience.
I thought a thread that would pop up on a search for a fair number of these terms would help particularly newbies, and those for whom English is not their first language.
I'll kick things off with
Air-ball = failure to create lip vibration when striking a note, resulting in air flow with no sound.
Aperture = 'tunnel' of variable length and diameter formed by embouchure for exhalation and pertinent vibrations.
Armstrong = high range technique based primarily on contraction of the biceps; see Pressure.
(The) Basics Sheet = see http://www.trumpetmaster.com/vb/f136...tml#post662891 (The Basics Sheet)
BFB = big full breath.
Biff = see Clam.
Blanched = see Dead tone
Blast = play at a volume beyond ones ability to control tone and pitch.
Bone = trombone - preferred fallback for failed trumpeters.
Breath attack = untongued articulation using the syllable "hoo"
Bright = quality of sound rich in harmonic overtones.
Choke = fail miserably during a solo or performance; shut off air flow.
Circle of breath = see http://www.trumpetmaster.com/vb/f131...tml#post795148 (Advice from my instructor)
Clam = general term for a mistake, missed accidental or rhythm etc.
Colour = character of a sound due to the higher harmonic overtones, and various stylistic technical effects.
Compact = sound with moderate Core (q.v.) and little peripheral Spread (q.v.)
Compression = reduction of lung volume due to muscular contraction of various anatomical parts.
Core = concerning the clarity and resonance of the lowest harmonics of a sound.
Cornet = small horn.
Cut (through) = emphasise a line with a non-blending tone rather than sheer volume - see Laser Tone
Dark = quality of sound rich in the Core (q.v.) tones.
Dead tone = executed without vibrato.
(with) Derby = muted effect using a bowler hat.
DHC = "Double High C" - space above the 5th leger line over the treble stave.
Doit = upward glissando.
Embrochure = misspelling of embouchure typical of those who read brochures but not books.
f = forty pace pain threshold.
ff = square of f (q.v.)
Flub = see Clam.
Flugel = small tuba.
Focused = Compact (q.v.) sound with narrow Core (q.v.)
Frankenhorn = instrument cobbled together from parts of various other models.
Gap = clearance between end of mouthpiece shank and lead pipe with mysterious, unknowable properties.
Growl = onomatopœic, highly coloured tonal effect.
Heft = a 'weighty' tone - sonorous and authoritative.
Impedance = a measure of the minimum extra 'effort' required to raise loudness one unit at a given pitch.
IPA = 91 vol% solution of isopropyl alcohol - useful for sterilising inside tubing etc.
It! = any pathetic, embarrassing or shameful affliction; see N+1.
KTM = k-tongue modified - a popular modern tonguing technique.
Lamp = low quality or otherwise unserviceable instrument.
Laser tone = penetrating, very Focused (q.v.) sound with limited tonal Colour (q.v.)
Lick = a small phrase, generally undeveloped, that someone enjoys playing.
mf = (in style of) Maynard Ferguson - loud, up an octave and add a lip trill.
mp = mighty powerful.
N+1 = one more trumpet to add to the collection; also a certifiable addictive condition that craves N+1.
N+2 = acute case of N+1 (q.v.)
Nail it = successfully execute (e.g.) a challenging high note.
Noodle = to play groups of random notes, perhaps in search of a Lick (q.v.) or theme.
Oboe = an ill wind no-one blows any good.
Octave key = hook mounted on leadpipe for small finger - often used to extend range via Pressure (q.v.)
Open = with no valves depressed; alternatively, presenting low Impedance (q.v.)
p = powerful.
Pinky hook = see Octave key
Plop = downward glissando.
Pop = precisely articulated slur; alternatively, post-concert beverage.
pp = pretty powerful.
Premature articulation = an entry made too early, with likely risk of Train wreck (q.v.)
Pressure = force of mouthpiece against embouchure - often applied excessively for range extension.
Projection = capability of making oneself clearly audible at a distance.
Resistance = grossly misleading malapropism for Impedance (q.v.)
Resonance = the core sound strength of an instrument played in sympathy with it's natural harmonics.
Ray of power = see http://www.trumpetmaster.com/vb/f131...tml#post379527 (Breathing?)
Reverse(d) lead pipe = a lead pipe that extends as a leg within a main tuning slide sleeve.
Scat = stylised imitation of vocalist who has forgotten his lyrics - characteristic style of Satchmo.
Screamer = mouthpiece designed specifically to assist extended playing in extreme register.
Sizzle = onomatopœic quality of some Bright (q.v.) sounds, perhaps including tonal distortion.
Slot = low impedance 'sweet spot' - may be narrow, wide, more or less close to pitch intended.
Spitball = balled up paper etc. blown through trumpet to clean inside tubing.
Spread = the more peripheral, diffuse elements in a sound.
Stradivarious = predominantly Bach-based Frankenhorn (q.v.)
Stuffy = presenting a high Impedance (q.v.)
Tacet = musical passage in which trumpets are silent due to excessive difficulty, boredom, bar visit, death etc.
Train wreck = collapse of an ensemble performance due to a catastrophically misplayed phrase.
TSO = "Trumpet Shaped Object" - cheaply made instrument of limited musical capability.
Tuneritis = Degenerative affliction caused by believing electronics and ignoring one's ear.
Viola = more vile.
Violist = most vile.
Welly it = play in unrestrained fashion - see ff.
Zombie = resurrected old thread.
If you're sure of the appropriate meaning of these terms, or can think of others that should be added to the list, please post/discuss below so I can update this posting.
We obviously don't need non-trumpet related definitions of these words. That's what dictionaries are for.