Slang defined for confused and, or wasted.
"Man, did you see Becky last night?! She was so mecked"
"Oh I know she was tipsy all morning"
"hahaha those pictures are so going on facebook"
"thats what happens when you get mecked"
Not to be confused with PETA, or the People for the Ethical Treatment of Animals, nor the Palestinian Information Technology Association, because that's silly.
i.e.: I really wish Isreal would stop prank calling the PITA...