Top definition
The act that involves getting so ridiculously drunk that you end up getting a blow job from your friend's grandmother.
George: Yo guys, what's good for tonight?

Marc: I'm having people over, you can come and chill.

Henry: There better be lots of alcohol, I'm trying to get gransloshed tonight.

James: Sick dude.
by ihaveatwelveinchpenis June 14, 2013
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