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."