prison mustache 

The "prison mustache", as popularized by members of the Aryan Brotherhood prison gang is an exaggerated version of the Handlebar Mustache. The ends of the "handlebars" are allowed to grow very thick and bushy. It somewhat resembles a long, thick goatee beard with the point of the chin shaved.

That guy is definitely an ex-con. Look at his prison mustache and his Nazi Low Rider tats.

prison mustache by sparkhammer November 10, 2010

prison moustache 

The slightly shorter cousin of the Handlebar Moustache. Commonly worn by Ex-cons,Bikers, and Heroin Addicts. It comes down just below the edge of the lips, and can be as long as the middle chin level, but not to bottom of chin (see Handlebar Moustache)The aesthetic purpose might be to hide missing teeth,or to scare off potential employers,thus securing an unemployment check. Presence of such Moustache indicates a need to intimidate others or secret desire to be Mexican(when worn by Caucasians)

"That guy looks like a total derelict with that crappy prison moustache."

prison moustache by $ovietn@m August 12, 2008