Urban for "bullshit" but with a connotation of absurdity. Said quickly with the article "Das" before it. Used to reject a proposition so preposterous no one could reasonably believe it.
"I asked my boyfriend if he wanted to have a threesome with my girlfriend Jill but he rejected the idea."
"Das boosit."
"Das boosit."
by ponytrekker April 12, 2010
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