Top Definition
To pleasure oneself sexually. Often refers to male masturbation and can be used as a synonym for jacking off or spanking the monkey

Example A
man what did you do saturday night?

oh nothing just watched the hockey game then smashed myself

Example B

Hey, you ever sit on your hand until it falls asleep and then smash yourself ? It feels like someone else is doing it.

by Smash Yourslef! February 17, 2009
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