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A friend of a significant other that they spend time with as friends (i.e. get tea, etc), but you know they've hooked up.
Guy 1: Hey, where's your girlfriend tonight?
Guy 2: She's out with her tea friend....
Guy 1: Oh no! Do you think anything is going on?
Guy 2: It's probably ok, they stopped hooking up a year before we started dating.
by banana2028 April 17, 2011