Top Definition
Attending a sales conference, where as an engineer you're in the minority, getting grin fucked for 3 days by no less than 100 sales people.
John: "How did you like that sales conference last week? Swanky hotel, right?"

Tim: "Yeah, it was great except for the grin bang that lasted 3 days..."
by mrxinu January 25, 2009
6 Words related to grin bang

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