When they try to catch me riding dirty.

A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.

1. the need for someone to stop doing what they're doing, take a chill pill, and just relax; usually directed towards someone who is about to be or already is completely wasted

2. when you're just about to become or already are "that guy" at the party

-verb: To vomit.
-noun: Vomit.