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1.
The words spoken after a devision by zero, but before the catastrophic mathematical monstrosity has time to destroy the universe.
7/0
"OH SHI-"
*universe folds itself out of existence*
by Atolm August 09, 2006
 
2.
A variation of oh shit. The last letter/sound is cut off by something happening, usually an explosion or falling off a rock face.
What do you mean "there's no pin on that grenade"?
OH SHI-<ka fucking blammo>
by nujer December 24, 2005
 
3.
Usually stated when realizing you are completely fucked and are about to be killed or be mortally wounded. Also used when someone has fucked up and is about to blow themselves or something important to kingdom come.
Guy: *plants a bomb on the building* Wait...that's OUR building! OH SHI- *Insert generic massive explosion here*
by Drunken Demoman March 13, 2010
 
4.
The part of "OHSHIT!" you manage to say before the catastrophe.
Hey, that's a bomb... OHSHI-
BOOM.
by Pandubear January 04, 2009
 
5.
Used as a ways to shorten the term, "Oh shit."
"Ohshi nigga, my milkshake brings all da boys to da playground."
by Ace March 07, 2004
 
6.
Short for "Oh Shit." Commonly used for less vulgar purposes or to make it sound more like "Yoshi" from Super Mario or something. Its really great.
"Ohshi, I forgot my chemistry textbook. I'm such a doofus."
by Mr. Upchuckles October 24, 2007
 
7.
Short for "Oh Shit." Commonly used for less vulgar purposes or to make it sound more like "Yoshi" from Super Mario or something. Its really great.
"Ohshi, I forgot my chemistry textbook. I'm such a doofus."
by Mr. Upchuckles October 24, 2007