OT4 

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!!!

OT4 by ZelmanC. May 22, 2007

OT4 

One true paring became One true FOURSOME!!! AAAAAAA

“Hey, did you read that fanfiction about 5SOS OT4?”
“Yeah, pretty good. I ship them all!”
“I ship Lashton and Malum.”
“No way same!”
“But the 4 of them shipped together is better.”
“HELL YEAH!”

OT4 by f4d3Rs May 29, 2018

ot4 

ot4 “one true” ot4 can be used for one direction without zayn or for 5sos for the four boys. ot9 is for all 1D boys and 5sos boys.

ot4 & ot9
person 1:are you apart of the 5sos fandom?
person 2: yes i’m an ot5
person 1: are you a directioner and 5soser?
person 2: yes i’m an ot9

ot4 by lolokay January 12, 2021

OT4 

Fifth harmony after Camila Cabello left the band

I think that Fifth Harmony is doing better without Camila. #OT4

OT4 by Nicholas Romanov March 31, 2018

OT4.5

Pretentious one directioners who claim to love and follow all 5 of the original members of 1D (Harry, Liam, Louis, Niall and Zayn), but secretly hates one of them, and keep a micro aggressive behaviour towards one (more specifically seen in case of Liam).

Someone who pretends to be morally superior (holier-than-thou) but is opposite of the nature.

"They claim to be OT5 directioner, but secretly their behaviour shows that they're OT4.5

OT4.5 by Faith_ May 9, 2026