Top Definition
Same as OTP and OT3 (One True Pairing and One True Threesome), but with four people. Actually, you could add any number after "OT" and it would mean a pairing with that many people, but it's rare to see more than three people in OTP's.
Crazy yaoi fangirl: OMG!! SasukexNarutoxGaaraxNeji is so my OT4!!!
by ZelmanC. May 07, 2007

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