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1.
short for improvisation, a comedy format in which the performers make up the scene on the spot
I saw some awesome improv at comedysportz last night
by Vlady May 09, 2003
 
2.
improvisational theater, performances where the material is improvised on the spot while they already in progress.
I don't think we are ready for improv yet.
by The Return of Light Joker February 11, 2009
 
3.
generally used after making a ridiculously funny statement, causing even more laughter from your peers
Yo man that joke was mad improv!!!
by lucci July 19, 2006