1) To spin the tires of a car to the point they start to smoke. To do a "Burn out" or "Smoking the tires".
1a) The visual equivalent is extending the index pointer finger of one or both hands and rotating it in a fast circular motion.

2) A phrase used by TV / Movie cops to turn on the cars lights and sirens to pull somebody over.

3) Military slang: To open fire on the enemy.
1) Before drag racing you have to light em up to get the tires hot

2) That car looks suspicious, light em up
by That's Capt Obvious to you December 28, 2011
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An order given to start firing your weapon at the enemy. Used extensively in war movies and TV programmes such as "Generation Kill"
Yeah... they look unarmed... light em up!
by cod4andchips October 31, 2009
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in paintball, or any form of gun-based combat, it is a phrase meaning "concentrate fire on that guy", or "shoot him till he screams"
by rob October 4, 2004
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A slogan that supports autistic people to freely express themselves. This goes in contrast to "light it up blue" which only promotes the awareness of autism, even though almost everyone has at least heard of autism by now. "light it up red" however, promotes respect and acceptance towards autistic individuals and is a more meaningful way to promote the autistic community.
Red is the color of love, ambition, and respect. Blue is the color of disappointment and depression. Lets light it up red instead to let everyone know that the autistic community is capable of understanding and respect.
by Dubiks December 7, 2018
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drinkin till you cant drink no more
dude 1: whatchu doin tonight
dude 2: drankin
dude 1: wanna light em up
dude 2: lets light em the fuck up
by mike and dom January 7, 2009
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If you don't obey the cop, he's going to light you up!
by SuperGlue July 24, 2015
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Appalachian slang, to spank a child on the bottom.
The little boy's mother stated, "If you don't stop that misbehaving, I'm gonna light you up".
by lo-tech-nannie August 1, 2007
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