7
Abbreviation for octal. Used in computer science and mathematics. The octal number system is a base eight number system, meaning there is no 8 or 9 digit used.

For example the number 9 would be written as 11, because there is no 8 or 9.
Mathematicians often confuse Christmas and Halloween because DEC 25 = OCT 31

(decimal 25 = octal 31)
by bekinator May 09, 2005
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8
A vagina. Used when making fun of a friend.
Did you here mike talking in that gay voice?! Haha! What an oct!!
by Abgeodnslsn January 10, 2012
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9
obsessive compulsive tagging
a web 2.0 ailment characterized by an uncontrollable urge to social-bookmark everything.
his OCT got worse when he started using ma.gnolia.
by coolmel March 12, 2006
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11
Acronym for "original character tournament", a type of collaborative event where numerous artists portray their characters duking it out in tournament format. Mostly popular within art communities like DeviantArt.

Once all of the slots have been filled, two artists in their respective rounds are challenged with creating comics of their OC defeating the other in combat. The winner is decided by the judges choosing which one is canon based off of the quality of the writing, art, and/or the tactical logic of the comic. Rinse and repeat until only the winner remains.
"Man I remember that old Endzone OCT back in like, 2007. That was the most hype shit."

"literally what the fuck is an oh sea tea"
by classified288 January 20, 2021
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