When you flash your high-beams at a passing car in order to warn them of (usually hidden) police presence nearby.
Jackie: Why'd that guy flash his high-beams at you?
Zach: He's giving me the high-beam heads-up. The 5-0 must be checking speeds up the street.
by Andy Takai January 9, 2009
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1. The condition of being absolutely oblivious to surroundings 2. Acting like an asshole
1. "You didn't know the pope died? You have your head up your ass, dude"
2. "You told everyone you had sex with my mom!? You have your head up your ass, dude"
by Dylan K. April 24, 2006
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To talk someone into thinking they can do something when they really cannot do it or to make someone feel special when they really are not.
Ex 1: Jamie did a round off double back handspring layout. The team then tried to pump her head up into thinking she could pull a full twisting layout, as well.

Cheer Team: Jamie, try a full!

Shaqueelah: uh-uh, ya'll don't try and pump her head up like that when you know she can't do that!
Ex 2: Jamie is running for homecoming princess for her senior year. Her peers are making it seem like they will vote for her and she will win, but they're really just pumpin' her head up.
by GymTyme October 2, 2010
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when your so busy being a dick head and not knowing what your doing that at one point you buy yourself a glass stomach so you can see ware your going because your head is so far up ones ass.
HOLY SHIT GET YOUR HEAD OUT OF YOUR ASS YOU FUCKING PRICK!

wow sweet glass stomach i wish i had my head up ones ass.
by jesse tomasello December 7, 2008
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Someone who looks like they changed in the dark, but sad to say that's the way they dress.
You see one of your friends who looks like a mess with what they're wearing so you say things like I like that, I like that where you get that at etc. Your friend starts to tell you and you say Nahh man I'm just cappin ya head up
by SweetDaddiexoxo February 4, 2011
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An attitude of superiority while being in a constant state of confusion. Or situational temporary feeling about making a mistake, I.e., hide sight is always 20/20.
I didn't see that coming, because I had head up rectum visualitis.
by mministerGW3 June 7, 2017
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