beast with two backs 

to have sex, having intercourse

wendy and marcus made the beast with two backs after serious foreplay

beast with two backs by Adriana G. May 3, 2006

beast with two backs 

A man and woman engaged in an act of sexual intercourse. An expression whose usage dates at least as early 1604, being mentioned in Shakespeare's Othello.

Your girlfriend and your bestfriend are making the beast with two backs.

beast with two backs by Lenee January 22, 2007

beast with two backs 

The frightening moaning creature that two people become when they engage in intercourse

Watch a porno and you'll know what I mean. The beast with two backs can even be found in your bedroom or any popular sexual habitat

beast with two backs by Marisha A January 23, 2007

the beast with two backs 

When a man and a woman are having sex face-to-face they become the Beast with two backs

Come back to my place baby and we can make the Beast with two backs

the beast with two backs by ben-wa November 12, 2016

makin the beast with two backs 

Face to face Sex... Yeahhhh Baaaaaaby

makin the beast with two backs by Vern October 16, 2002

to make the beast with two backs 

Kind of joke. When twoo people are having sex, it looks like a beast with two backs

Just to make the beast with two backs.

to make the beast with two backs by ammar90 September 10, 2010

Beast with two Backaches 

Old people sex!

When we do make the beast with two backaches, our onomatopoeia is less "ooh" and "ahh" than "crack" and "help".
Credit Chris Onstad

Beast with two Backaches by OP8 Massive February 18, 2009