Air: refers to frequencies above 12hz. A quality that allows the song to breathe a little. A feeling of spaciousness.

Angular: This means nothing. If people use this term, ask them to explain themselves. They've just gone over the deep end.

Body: The frequency range of an instrument where it produces its richest tone, often around 800hz to 1khz.

Bright: Lots of high end, usually referring to frequencies above 8Khz.

Cold: Lacking warmth. Often used as a derogatory term to describe digital recordings. It could also mean too much high end in a recording.  In this case, reduce frequencies above 10khz slightly.

Crisp: See bright.

Dark: Lacking high frequency brightness. Could also be dull.

Dry: An instrument without effects applied to it.

Dull: See dark.

Edgy: An extreme of punchy,bordering on uncomfortable,depending on the music

Grainy: Poor digital resolution.

Muddy: Lack of definition in a sound.often as a result of to much low-mid (400hz to 800hz) energy.

Nasally: Too much midrange energy,around 1 to 2 khz in some instruments

Orange: Get this guy out of the studio;he's just making stuff up

Plosives: The result of saying  or singing 'P' sounds.

Presence:  A nice balance between an instruments attack and its main tone.  Usually attained by adding 2 to 5 khz frequencies.

Punchy: A nice attack and sense of presence. A punchy sound can come from your performance, your instrument, or effective use of a compressor.

Shimmer: Frequencies above 12khz. Similar to Air.

Sibilance: Pronounced 'S' sounds.

Warm: Lacking harshness or coldness.  This is a catch-all term used to describe anything from analog equipment to a pleasing quality that can't be put into words. Use thus term around nonrecording people whenever you want to sound like you know what you' re talking about. When someone else uses this term repeatedly,  take his or her recording advice with a grain of salt (a large one).

Wet: An instrument with effect applied to it.