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to react nonchalantly to a possible interest of the opposite sex (you contain actual interest a.k.a you want that bootaay) "playing it cool"
Scenario: Boy likes really hott girl

(hot)Girl: hey want to hangout later?
Boy: yea sure, we could do something.
(girl walks away)
Friend: Yo man you acted so bootychill
by DLOT October 12, 2008
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