Short for: Other People's Plates. Used in describing someone who only likes to eat what food other people have on their plate or have ordered at a restaurant.
Courtney ordered the chicken milanese, but I know she'll just eat off OPP.
Alex: You want a bite of my salad?
Ashley: Yea, I'm down with OPP!
Alex: You want a bite of my salad?
Ashley: Yea, I'm down with OPP!
by Cojoface March 18, 2010