Top definition
When at a live musical performance, the audience claps to a beat, but it sounds like a crescendo due to members of the audience being musically inept and thus unable to clap on beat. Found at most shitty bands performances for obvious reasons.
Jonathan: My girlfriend drug me to a Nickleback concert and the audience was crescendo clapping to all their shitty songs and it made it even worse than it already was!

Ron: Damn.
by behemoth887 July 08, 2009
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