Top Definition
The act of playing Super Smash Bros. Melee.
"Yo, lets smash it up!"
by [CUA]Todd07 November 10, 2004
1 more definition
a song by the damned of their machine gun etiquete album
its in two parts tbe opeing being a soft semi acustic the second part being a driving song about rebleion
also coverd by the offspring on batman returns
smash it up is a kick arse song
by Omen April 17, 2006

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