The fat,ugly, or fat and ugly girl that attaches herself to a good looking girl. The soul existance of a gatekeeper is to keep the pretty girl from ever meeting someone. If the gatekeeper is beaten by a man know as the chosen one or a man with a wingman the gatekeeper will no longer have any reason to exist and becomes a fallen gatekeeper.
Did you see that hottie at the end of the bar? dude, fly wingman for me and take out the gatekeeper.
by KungFu April 5, 2005
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Female appendages that forestall, deter, or prevent procreative sex.

Gatekeepers work to prevent conception
horny? you'll encounter Gatekeepers before you can orgasm

Gatekeepers are contraceptive

I wanted in her pussy but when I insisted on getting past her ultimate Gatekeepers... I discovered anal sex is a THOUSAND times more fucking awesome

As long as the position you fuck her in has her ass BELOW her pussy, anal sex is contraceptive (and not abortifacient like pussy on birth control), so her Gatekeepers are more likely to allow it.

She likes penis but (of course size does matter) she is not ready to conceive a child with you.

Some of her Gatekeepers perform double duty: left hand, right hand.

Appease her Gatekeepers and masturbate to your homemade sex video you made with her

The better your refractory period the more you will encounter Gatekeepers

Her Gatekeepers don't care how often you use porn: she prefers you use porn instead of using her.

If her Gatekeepers won't let you in her ass dump her.

When she refuses making a fucking video dump that Gatekeeper.
by bluntlier July 8, 2012
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When a woman(usually fat) falsely protects her freinds(usually hot) from hooking up with guys in clubs due to her large arse uglyness and lack of self esteem.
(in club)
Knock out Ned- hey baby wanna go for a rideeeeeeee?

gatekeeper- ahhhh alice dosnt like hot guys with washboard abs and phd's in physics.

Alice- Yes i do...

Gatekeeper- shut up .. now come to the toilet with me so i can pamper my insercurities( chin)

Knock out Ned- fukin Gatekeeper
by bukkakanise October 4, 2005
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The Gatekeeper is the person who upon receiving a bowl or a blunt within the circle, begins inhaling off the hit in the chamber that is left from the previous smoker. The Gatekeeper is not a frowned upon or derogatory term.
Steve is the type of Gatekeeper smoker.

I had to be Gatekeeper, I had no lighter on me.
by Mr. 303 June 17, 2011
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A gatekeeper is a distinctly solid turd at the beginning of a pooing session, which immediately precludes a bout of explosive diarrhea. So named for the fact that this solid turd holds back the gates of ass vomit.
John: "Dude, I thought I was constipated last night, but it turns out it was just a gatekeeper and I think I broke my toilet."
Nathan: "That's what you get for drinking all that malt liquor!"
by Chimrichalds21 November 4, 2009
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A queer person, often but not necessarily a gay cis man, who attempts to exclude other groups from the general umbrella of queerness.
"I don't see why the miscellaneous queers get to march with us now"
"Because this is a celebration of solidarity with fellow queers, not your private gatekeeper's party"

"They reckon if you don't publicly transition, you're not one of us. They're a total gatekeeper."

"and then she called herself some kind of queer identity thing I have never heard of. I don't mean to be a gatekeeper but I honestly wasn't believing it was a real thing until she explained it."
by Notamycologist December 24, 2019
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