The act of putting headphones in or on one's ear so as to obstruct their ability to perceive auditory cues from their outside environment.
I'm headed up so if you need me give me a tap on the shoulder.
by TGChris November 25, 2010
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Advance notice of something that will need attention.
Just a heads up that the customer is likely to escalate this problem...
by AKG August 30, 2005
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Just wanted to give you a heads up so you'll be expecting his call.
by mandingoe January 18, 2005
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To give someone a warning of iminent danger, trouble or strife.
Dude - Jonny's banging Daves wife! I best call him and give him a heads up!
by Jon-E-Boy January 25, 2006
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Exclamatory warning indicating that one practice increased alertness to avoid harm from a pressing threat.
Dorm Resident #1: Is that an M-80 in the toilet?

Dorm Resident #2: Heads up!!!!

*BOOOM!!*
by kwashia March 28, 2005
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