To completely fuck up something despite having taken every safety precaution except for not killing your damn self for being such an idiot.
OMFG, you just mased your $100k car in that accident!
by opsman February 21, 2003
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Mased is similar to based. Except the term mased is used to describe something you see but it depends on what it is.
Example 1:

P1:Awww look at those two people hugging. It's adorable:)
P2: Yeah that's pretty mased man.

Example 2:
P1: Oh my god, can you believe what Becky just did? What a bitch!
P2: Yeah that's pretty mased if you ask me

Example 3:

P1: I hate my school. My teachers. My classmates. They can't understand me!!! Y'know what will teach them?! My dads AK.
P2: Don't do it man, it isn't worth it.
P1: But...yeah. You're right. It would be mased of me to do that.
by thepicklegod July 1, 2021
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When you put a motherboard in a case without standoffs, and then turn it on and wonder why the whole damn thing catches on fire, you have officially mased your motherboard.
by Kuja February 25, 2003
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“Yo, no funny shit, i finna mase ya niggas.”

“His lil ass betta pull up. or he finna get mased”.
by D-Maul August 8, 2018
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" Mase us a cheeky till friday bro?"
by motyma November 23, 2011
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A rapper who is: "Young, black, and famous, with money hangin out the anus."
"Young, black, and famous, with money hangin out the anus." Mase - Can't Nobody Hold me Down
by HA HA MIKE JONES HA HA February 11, 2009
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A Rapper, the Harlem World nigga, after second album became a minister
Mase was the shit
by Me May 26, 2003
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