To get high on heroin or other opiates due to the characteristic constricted pupils. They look like someone got a lot of light
"You look lit up, were you banging that tar?"
by mikey mikey c March 6, 2008
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Lucy often went to work all lit up on hillbilly heroin because she couldn't stand her job.
by OneBadAsp October 21, 2006
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to unload your cum in someones face
"That chick got lit up with you seed....damn!"
by Rez Murdok September 8, 2003
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Get lit up means to excite or motivate toward being fully exuberant and excited about life, ones interest or current situation.

This term is synonymous with "Get Hype" "Get Excited" "Get on fire"

Slogan of shoe brand LUMINARECO
A DJ speaking to a crowd during a performance:
Yo, i wanna see you get hype, get lit up!!
by LUMINARECO April 18, 2016
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Being shot a lot in just a few seconds
Person one: *getting shot at in the gulag* Jeez I’m getting lit up like a Christmas tree!
by War zone boi December 2, 2020
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Being high on cocaine in the 80s, 90s and 2000s.
I'm Lit Up like a mutha fuckin christmas tree!!!
by Dynomiite March 5, 2022
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