Top Definition
1. To ad-lib climactically.
2. An eruption of "off-the-cuff" actions and/or statements.
I improvagasmed all over the place to get out of taking that calculus test.
or
The comedians dropped a whole heaping ton of improvagasm on the audience and it was met with great success.
by Rman1 January 30, 2012
5 Words related to improvagasm

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