OTP is short for the term 'one true pairing' and it's used in fictional (they are real for us) books and movies (fandom), Celebrities or others, who people ship them together. A ship is the same thing, when you love this OTP forever.
celebrity
Noora: OMG Emma Watson revealed that she had a crush on Tom Felton!
Maya: and an interviewer asked Tom if he had a crush on her, Tom said: I forgot which way.
Noora: so Feltson is Now my OTP I totally ship them!
Maya: OmG yes count me in!
Fandom
Noora: Do you have an OTP?
Maya: Yes obviously, I ship Dramione, even though it's not happening.. :(
Noora: Omg me too!
Noora: OMG Emma Watson revealed that she had a crush on Tom Felton!
Maya: and an interviewer asked Tom if he had a crush on her, Tom said: I forgot which way.
Noora: so Feltson is Now my OTP I totally ship them!
Maya: OmG yes count me in!
Fandom
Noora: Do you have an OTP?
Maya: Yes obviously, I ship Dramione, even though it's not happening.. :(
Noora: Omg me too!
by H.P.F.Noora June 22, 2016

It's slang used in Atlanta, standing for Out The Perimeter. Out the perimeter is outside of I-285, which surrounds DeKalb County, hosting the city of Atlanta.
ATL Nigga 1: Aye ain't Johnny from Covington?
ATL Nigga 2: Yea, that bum nigga OTP, fronting like he from Decatur
ATL Nigga 2: Yea, that bum nigga OTP, fronting like he from Decatur
by Bummies November 21, 2018

One True Pairing (OTP), your favorite combination of characters in a fandom. Usually used on fictional characters in books and anime.
KiriBaku is my OTP between Kirishima and Bakougo, they're so gay for each other.
Ron and Hermione are the perfect OTP in Harry Potter.
Ron and Hermione are the perfect OTP in Harry Potter.
by theguythatmakesgayships October 13, 2018

by Dadalabum February 8, 2019

by Damndest Chili November 28, 2018

by Hsellers12349 August 20, 2018
