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The practice of holding a hand out the window while driving at high speed and "cupping" the oncoming air as though it were a boob.
HMB: Hey, mind if I open a window?

DTM: Sure. Did you fart?

HMB: No, I just want to grab an air boob.

DTM: Ahhh, yes. Air boob time!

HMB: AIR BOOOOOOOOB!

(Both roll down windows, grab air boob.)

DTM's dad (confused): ..."air boob"...?
by HMB September 15, 2009
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