The male half of a relationship who allows and finds sexual gratification in allowing and even encouraging his female partner to have sex with other men. Not to be confused with the CUCKOLD relationship where the male is typically weak and into humiliation. Stags are dominant but want to share their women.
I met a STAG at the bar who invited me to his home when he noticed his wife checking me out and flirting with me.
by WONDERINGO January 1, 2017
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1. A man about to be married (particularly when on a night out (known as a stag do) with his friends to celebrate his final few days of pre-conjugal freedom.)

2. A male-only social gathering

3. A man who attends a social gathering without their partner.

4. The adult male of various deer, especially the red deer.
1. Paddy is the stag when we go to Newcastle.

2. I can't wait to go on Paddy's stag.

3. Paddy came out as a stag in Newcastle.

4. Look at that beautiful stag - make sure you keep down-wind.
by Dan Fox August 5, 2003
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a straight-boy hag. the best friend of a gay man.
My stag Andrew went to the party with me last night. He's such a great wingman.
by fred2342342 February 4, 2011
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A socially accepted, cool way to say "I am a big loser who couldn't get a date, but need something shorter than this to answer peoples' question of 'Who are you going with?'
"Who are you going with?"
"I'm going stag"
"Oh...what a loser."
"I know."
by David May 6, 2005
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Australian for a hard on, erection or whatever you want to call it
Oh man that porn gave me the biggest stag
by Ur MOM February 15, 2005
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A pixelated porn loop that was released in the 90's on the Commodore Amiga that pre pubescent boys loved to watch.
*Rakesh's sister sees Rakesh playing stag while jacking off on his Commodore Amiga"

Sister: What the hell are you doing?
Sister: I'm telling mom...
Rakesh: no dont, Ill let you watch...
Sister: ok

*Rakesh continues jacking his khrum*
by Zoo Keeper June 27, 2008
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