OTP 

"One True Paring."
Used in fandoms to espress what charaters you ship. (put together romantically)
In some cases, OTP could mean "One of The many Pairings i ship" because you strongly pair many people together and can't choose just one.

Hannah/Justin is my OTP!

Jason/Lea and Hannah/Justin are my OTPs!

OTP by jakedirkiscanon August 22, 2012

OTP 

Stands for One True Pairing. Used to describe a couple (usually fictional) who you think are perfect together.

"Do you ship Willa with Philby, Maybeck, or Finn?"
"Philby! Wilby is my OTP!"

OTP by Chaylinn June 2, 2013

OTP 

On the phone

Chris; ayo, what you doing dawgs?

Mike; OTP with my girl, ima call you back.

OTP by Coolnightmares October 29, 2014

OTP 

On The Piss. meaning to have several beers and get drunk

are the boys OTP tonight

OTP by Tackhead September 6, 2007

OTP 

Short for On The Piss, slang for the act of getting drunk.
Also, OTPTN (On The Piss Tonight)
and SOTP (So On The Piss)
and lastly, NOTP (Not On The Piss)

"Hey bro, are you OTPTN?"
"Its Friday, I'm getting fucking rebecca blacked."

"OTP?"
"NOTP, I have to study"

HSC IS OTP!

OTP by thongerrr November 15, 2011

OTP 

On that pussy

I was otp last night

OTP by John1020 April 12, 2017

OTP 

One
True
Pairing

A term used among the many fanbases both online and in person, though it is most commonly found online.

"omFG I loVE AraSol iTS THE ufKIVCNG UGH ITS MY OTP!!!!"

"I prefer Jane's CatxHussie

OTP by WAKHEEM September 25, 2012