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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"Air boobs" is a term used to define the area of chest where a ladies chest balls should be but aren't

Some people have "air boobs" due a natural slow growth rate however others are caused by actions such as deviance, betrayal and the influence of bad friends
"hey bro did you see that photo? The one with jemmas friends all admiring her boobs?"

"Yeah bro, but idk what they're looking at all I see is air, air boobs, AIR BOOBS"
by Definitonmaster August 8, 2019
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