In regard to video games, to shoot an opposing player in either the crotch or ass. Also referred to as "Buttering" as in the episode of South Park where Butters shoots everyone in the crotch.
Guy 1: "Dude, you totally just shot him in the dick!"
Guy 2: "FOSTERED!"
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a word for someone who has more then one STD.
I know i have a foster on my cock after hooking up with that slam pig the other night.
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foster: people with no parents
parents dont want the kids
kids live with their grandparents
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when a female is deepthroating a male's genitalia and after gagging repeatedly, she vomits all over the penis.
Male 1: Dude, I got fostered by that chick who was deepthroating my dick. She is disgusting!
Male 2: Wow how nasty!
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Super athletic (mostly at football) and gets all of the laddies but only sticks to one and gets attached too easily.
Wow, that boy can really run the ball... yeah he must be a Foster.
another word for being rejected or denied by another individual
wow she just fostered you for the third time this week