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Slappin' the Grimlock is the coolest new activity you can do. Any hip new "thing" can be referred to in casual conversation as Slappin' the Grimlock, in order to confuse other people- the point being that if you have to ask what the other person means, you'll never be cool enough to partake in the activity.
"Hey man, me and my buddes are gonna go slap the Grimlock for a while, you wanna come?"

"The hell are you talking about?"

"Never mind... I guess you're just not cool enough to enjoy a good session of slappin' the Grimlock."
by Darc Discordia April 16, 2009
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