man-back 

When you are fucking a girl doggie-style and her back is hunched over.

Steve: Hey, I heard you fucked Diane last night.

Ted: Yea I was hitting it doggie but she had man-back and it really turned me off.

Steve: That sucks, my girl arches it perfectly.

man-back by murf09 July 1, 2009

man back 

When a woman has a very masculine back. This disturbing and very unfeminine feature includes any or all of these features: broad shoulders, large back muscles (lats and traps), or lots of moles or freckles.

Girlfriend: "Is that a man or a woman?"
Guy: "It's a girl, but that's some serious man back!"

man back by bumbobway December 23, 2005

Old man's back 

When your back hurt so much that you can't function properly anymore.

Therefore making you an old man.

Man, this PE class gave me the old man's back!

Old man's back by PeterTheGreen February 28, 2017

Back-door man 

A married woman's lover, who is, incidentally, a legendary figure in blues numbers.

- Let's drink one for the road!

- No, I am late!

- No worries, man! Back-door man will be out when you arrive at home anyway.

Back-door man by William Warney June 2, 2014

back door man

the man that some ones wife is seein on the side. usualy came to the back door to avoid any other house wives seein him.

jimmy the pool boy is my back door man

back door man by jojo the flying monkey January 5, 2004

Back Door Man

more background:
because the man she's cheating with would often use her "back door" for sex, have sex anally, so that the husband wouldn't detect she's had sex with someone else (if he had sex with her later). Also, for the woman, to avoid pregnancy by someone other than her husband. (and thus, avoid getting caught cheating when the baby didn't look like, or was a different color than, the husband.

That is Betty's back door man she's with tonight.

Back Door Man by xr7 August 31, 2004

Back Door Man

One who perfers to insert their penis into an anus

Look at Johnny checking him out. Johnny's a "Back Door Man"

Back Door Man by Fabian September 27, 2003