The result of an agreed upon friendship gone awry through conscious manipulation on the side of one party; generally involves a series of "hang outs" where one party enjoys the company, while the other maneuvers to turn the corner toward a mutually-desired relationship.
Guy: I'd love to hang out with you, but only as friends.
Girl: Oh sure--that's what I wanted anyway--it's great to have friends from the opposite sex to just hang out with! (meanwhile, she tells her friends the two are dating....)
ex: "I thought we were only friends, but he was trick dating me the whole time, so I had to break up from my non-dating relationship!"