Top Definition
A young, relatively fit male who signs up for beginner-level YMCA exercise classes so he can hit on the better-looking girls and MILFs in a competition-free environment. Variation of "gigolo."
Guy 1: Hey, Mason, wanna go to the park and hoop like all the other dudes our age?

Guy 2: Naw, man, I've got a water aerobics class at 7:30, and Helen might be there now that her hip is better.

Guy 1: Oh my god, you're such a fucking Y-golo.
by Wuzee August 10, 2011

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