Uncle Tom in Farsi (literelly "Uncle Abbas" in Persian). Someone who sells out. One who cannot be trusted. A poser. Also used for just about any avereage Joe in any context because it sounds funny or fitting.
A guy who can't be trusted since his loyalties lie with a woman or women he barely knows, in-turn betraying his friend's trust in order to gain favor with a woman.
"This Amoo Abbas would stab his own mother in the back if it meant he would get ahead. I can't believe he told my girlfriend what happened the other night even after I asked him not to say anything. So much for friendship and loyalty."
Also, "Check this Amoo Abbas out trying to pretend like he knows what he's doing."