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In regards to Foster. Getting so wasted that you are running into doors. Hitting the walls. Making flat-on-your-face falls into coffee tables. When this is the case you've pulled a Foster! Congratulations you are now completely inebriated and possibly a borderline alchoholic!
"Wow Foster you look pretty fostered, and I am almost certain you just pulled a foster!"

*falls down and hits coffee table*

"Yep..that was definitely a foster!"
Foster by Captain Obviousssss February 11, 2006
if a red flag was a person🚩🚩
Ew you see that kid he is deffo a foster
Yuh is such a red flag🚩🚩
Foster by Amongusissus6969 April 20, 2022
Along with being skilled in the art of inebriation he will also possess powers of sleeping in the same beds as females but without producing the expected sexual conquest.
"Dude, that hoe you were with last night was dope!!!! You take her home and fuck her in the ass?"

"Nah, we just slept in the same bed and talked about Pokemon."

"You Fostered again man"
Foster by Leslie Jamieson November 5, 2006
Being bailed on, bailer. Making plans with zero intentions of following through.
“Hey Danny did she foster you again”

Man I really needed help this weekend but dan pulled a “foster”
Foster by Pedy rabbit February 13, 2020
to drunkenly steal other people's items of clothes with the express purpose of sleeping in these items of clothes, most commonly only in those items of clothes. ie otherwise nude.

this activity normally takes place in a nightclub/bar late at night, but not exclusively. Certain people are prepared fosterers.
dude, look at her hat, its gnarly. i am totally going to foster in that tonight.
foster by dom spotley January 24, 2012
A short, constantly drunk 20somethingyearold who lives in Austin, TX. When he is not playing in one of his 9080948 local hardcore bands, you will likely run across him terrorizing hipster/fratboy keg parties with his friends, at which time he will be chanting, slurring, or yelling in a distinct southern drawl which only emerges in the ominous presence of alcohol. Be warned, the only intelligible words out of his mouth will be "FUCK", "YO", "DUDE(S)", "RAGE", or "FAGGOT". Foster goes to community college, is an adamant Bush supporter, still lives with his parents, and consumes superhuman quantities of various pills and PBR. he has also been reffered to by the community at large as a "Misunderstood Local Hero" due to his well-meaning but drunken antics.
Foster: "fuuuuckkkk youuuuu faggggotttt!!!!"
or
"yoooo dude lets fuckin raaaaage!!!!"
or
"4 more years!!!! troop surge motherfucker!!!"
or
"GIMMEEEE A BEEEER"
Foster by SwimFan98 December 15, 2008