From a list of prison vocabulary compiled by Dr. Prison, a San Diego consultancy that prepares convicts to serve their sentences.

Ass out: a prisoner who has so disrespected corrections officers that they will not give him anything

Birds on the line: a warning that someone is listening to a conversation

Blanket party: throwing a blanket over a prisoner so he can't identify an attacker

Bling bling: a warning that officers are coming

Bonaroo: a prisoner's best clothes

Bone: the dominant partner in a relationship between prisoners

Boof: contraband concealed in the rectum

Booty check: rectal search

Brake fluid: mind-control medication such as ...