Top definition
The act of smoking Cannabis and engaging in pleasuring oneself resulting in an intense cerebral ejaculation.
Shortly after hitting the bowl, I went into the bathroom to perform a weedwack.
by BasicBob January 18, 2013
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2
To get really high then jerk off
Alex: hey man want to come over later?
Mikey: Nah man I'm going to go WeedWack later!
by TheWaitesKid May 21, 2012
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