Refers to the hole in the crotch of men's pajama pants.
"Being female, I had to sew up the man gap in my pajama pants."

"On cold winter nights when urination is imminent, men are fortunate enough to have outdoor plumbing, so there is no need to pull their pants down and freeze. They can simply use the man gap in their pajama pants."
by Morrighainne MacHealey January 17, 2010
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Also known as rebound, a man that you're with or a hook up that doesn't represent what you want in a husband, but works for now.

Sometimes you think he's your new boo, or sometimes you know he's just a fling or a fuck boy, and sometimes you don't know.
"Hey, who's that new guy with Jenni?"
"Ohh, yea, that's Meyher."
"He's fine! Is that her new boo?"
"Yea, but he lives in his parents basement and plays video games all day. He's just her gap man."
by Jamesknapper October 24, 2018
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A man that will never be your husband, but you use as a fuckboy between bfs.
"Hey Jenni, is that your new bf?"
"Yea!"
"Is he the one? Husband material?"
"Naw, he's just good in bed and I got bored."
"Ahh, your gap man"
by Jamesknapper October 24, 2018
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