1 definition by runnerman

Top Definition
When a hot and or big breasted girl is using an iPod or other mp3 player and her ear bud cord dangles into her cleavage. Commonly seen at gyms, marathons or other athletic events.
Guy1: OMG look, that chick is workin' an iRack! Nice!
Guy2: Don't look for too long, she might notice.
by runnerman March 28, 2010

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