Op - original poster - person who first made posted the art, image, comment.
, etc etc.
Otp - one true pairing - the two characters in a fandom ( or cross fandoms) who you feel were meant to be together. Examples include but not limited to: Raven and Dexter, Apple and Daring, Lizzie and Kitty Hopper and Hunter.
Notp - no true pairing - the two characters you absolutely hate being together. You feel these two people would never ever get together.
Poc - Person(s) of Color - description to explain characters who are not White / Caucasian in origin. (Examples include but not limited to Afro-European, Asian, Indian, Polynesian, Hispanic, African American, American Indian, etc etc)
OC can also stand for Origonal Character