bennifriends 

to be sleeping with somebody your not in a relationship with. aka fuck buddies

"so are you and jessica dating?"

"nah were just bennifriends."

bennifriends by Jake Panarisi January 11, 2009

Benifriend 

Two friends who have a sexual relationship without being emotionally involved. Typically two good friends who have casual sex without a monogamous relationship or any kind of commitment.

Girl 1: "Hey! Is that your boyfriend?"

Girl2: "Nah, we're just benifriends."

Benifriend by Cameragirl1 September 1, 2010