a word used, usually in tabloids, to describe two people, usually famous people, who are enemies in the press and friends in real life or vice versa, generally a technique used simply to gain publicity.
lindsay lohan:omg look we're on the cover of US weekly AGAIN!!
paris hilton:omigod lindsay this frenemy thing is doing wonders for our image
10th,11th,and 12th graders in high school who think they have the right to be complete assholes and be jerks to all of the freshman just because they have been there longer.
freshman:your dating one....