OTP

OTP - "One Trick Pony"

Refers to a person putting an extraordinary amount of time into learning a certain one thing in a game. The meaning, OTP, is often used in games such as League of Legends where people are too mad at others, for acknowledging their skill with one champion, and thus try to flame them through the word OTP.

Example: "Disgusting Kayn OTP, go play Fortnite, noob!"