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A girl or guy that three friends have all gotten with in a relatively small time frame.

Also quadraho, pentaho, and sextaho
Guy 1: Yo didn't you get with Jennie a couple weeks ago?
Guy 2: Yeah, so did you.
Guy 1: I know, but she got with Steve last night.
Guy 2: Oh shit, she's a triho now
by Hayer Reed Icke August 05, 2011
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