1) A term used to describe one's body part which has become excessively cold.

2) Very cold.
After holding a cold drink for several minutes:
"My hand is so sub-zero right now."
by WongABong June 14, 2006
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A mentally-incapable person of low intelligence, whose IQ can only be represented on the negative side of the number line.
Rich: "Are you understanding what our substitute teacher is trying to get across to us?"

Johnson: "Hell no, Courtney warned me that he's a Subzero."
via giphy
by Emperor Henry V September 22, 2016
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The new Ferrari is so cool, it's sub zero.

Gabriel from Swordfish as described is sub zero: "He exists in a world beyond your world. What we only fantasize, he does. He lives a life where nothing is beyond him. But you know what? It's all a facade. For all his charm and charisma, his wealth, his expensive toys... he's a driven, unflinching, calculating machine. He takes what he wants, when he wants... and disappears"
by Hypno August 07, 2012
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The point in the night where you are so drunk you are obviously wasted to others just by observing how you walk. Its root is from the character in Mortal Kombat (specifically MKII) where he used a move to spray ice on the ground and when the opponent stepped on it he lost his balance (allowing him to be susceptible to an uppercut); due to the limited graphics, the loss of balance makes the character appear drunk.
Man, after drinking whiskey for 5 hours last night I was so subzero I fell through a plate glass window
by thefhuckup October 08, 2007
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when a girl is going down on a man, and before he nuts, he yells out "shhhhiiiinng" and pretends he's sub zero from morTal combat, freezing the girl in place with his special move.
"man last night this girl was suckin my dick and i pulled a sub zero on her."
by nigga gabe July 31, 2006
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Aqualung, your a fucking retard. First of all, its Scorpion who is a MK player who pwns the crap out of everyone and subzero is just a vagina thats undergon freezing temperatures.
by Scorpion > Sub-Zero July 18, 2005
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