the best way to describe the sweet sound of a high quality(often high cost)guitar tube amplifier past its saturation point. most often associated with mesa rectifiers.
person 1-"i just got this 6505 and cranked past 7 it sounds like straight liquid through the speaker....its wet dog lemme show you"
*person 1 plays riff and random guitar solos*
person 2-"huh? i think my ears are bleeding"