That guy Share definition Flag Someone who fools you not once not twice, but three times. You know him, You know the one. You go to the bar and he's all like: That Guy: This suit is uh, officially its a Giorgio Armani ech my dad knows him-Jon: FUCK YOU! I AIIIIIIIIIIIIIINT HAVIN' THAT SHIT! That guy by ME-sta April 27, 2017 Get the That guy mug.