a) (verb- to be): a nicer way of telling someone they have lost their mind
b) the literal meaning of the phrase is something you don't want to try any ways cuz it's retargerous
Peter, a guy I work with, invented the phrase wearing sandals in a warehouse, at least definition a) above.
After taking a shit, you wipe and some of the toilet paper is left behind with the poop feeling like sand in your butt. In the shower is the only time to remove anal sand.
Guy 1: Hey man, I just took a slimy shit and I got some anal sand up there.
Guy 2: I had the same thing happen to me yesterday. Use some soapy water Guy 1: I gotta go take a shower. It's chaffing my buns.