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.

by murf09 July 1, 2009

mans backing

to be someone elses bodygaurd, to stick up for them if someone else starts on them.

bob: come then bruv i'll bang
dave: nah you won't boi i'm his mans backing

by howard666 March 22, 2011

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!"

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!

by PeterTheGreen February 28, 2017