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The Philadelphia-originated codeword for "dome", "head", and "oral sex".
Guy 1: Yooo man, I was on last night and this girl gave me mad bahcii.
Guy 2: Was she bad dawg?
Guy 1: She was bad as shit.

Guy: Ay, what's up with the bahcii?
Girl: What the fuck, I just did it this morning!
by tlev May 20, 2009
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