Top Definition
female grundle; space between female's vagina and anus
His penis was so large, he ripped my boim.

Last night while having sex with my girlfriend, I licked her boim and she went wild.
#perenium #grundle #taint #chode #gooch
av tomlicker 10 juli 2010
The moment when, in the British TV show Doctor Who, a new person first enters the TARDIS and realizes it is bigger on the inside. A BOIM stands for a Bigger On the Inside Moment. BOIM's are usually accompanied by running around the TARDIS, and gaping.
"Whoa did you see Rory's BOIM last saturday?"
"Yeah it was hilarious!"
#tardis #doctor #doctor who #amy pond #bbc
av theoncomingstorm version 11 30 september 2011
The taste of a girl's pussy when she either is too-close to her period or peed recently.
Sheri always seems to taste like fucking boim, what a sloppy cunt she's got.
#pussy #oral sex #period #pee #gross
av threepenispenispenis 13 juli 2010
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