A bra, especially one that is tight-fitting.
Girl 1: Jennie! Grab your boob holster, and let's go! The dance starts in ten minutes!

Girl 2: I can't! My bra doesn't fit right!
by Leila C. December 4, 2007
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A fallacious individuals oral cavity.
She just wouldn't be quiet so I told her to shut her pole holster.
by A.H. Hanks February 9, 2014
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A Vagina. Also, the opening in Dan’s mouth.
by St.Ranges March 3, 2019
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whore, slut, a girl who uses her vagina as a holster for a cock.
"That girl gets around. She's such a cock holster!"
by KrisDee October 13, 2007
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Noun: one that is the receptical for a cock, ie. a holster. This person can be male or female and can be any varity of orifices.
noun: Nate is a big Cock Holster

Adj: Snow job is a Cocky little Holster.
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