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2. Roll a Fatty
To drive a steamroller over a fairly-to-exceptionally fat person, preferably male.
MJ: Yo man, you wanna go roll a fatty?

Kevin: Yeah, who you wanna do, Blake?!

MJ: Nah, too easy.
1. roll a fatty
the process of rolling a rather large joint, and then most likely toking it.
Hey, you roll any fattys lately??