verb When you have diarrhea so bad that you have nothing left to pass, and your ass starts retching. Similar to when you have nothing left to vomit, but from your anus's point of view.
"Hey, is Stevecoming out tonight?"
"Nah man, he has food poisoning. Left him butt retching for like three days."
Justin: dam you robbed that house?
Sally: fuck yeah and I ran from the cops!"
Justin: hell yeah man your ratchid as fuck!
Sally: whats that mean
Justin: neva mind...