The mix between being funny and annoying. When the guy is fucking up in every way but its so funny that you have to laugh (usually fucks up with a girl).
Girl: "I am going to choke you in a minute if you don't annoying me!"
Guy: "Don't lie...you know you love it when I'm funnoying"
Unlike the other people seem to suggest for this entry, a funboy is not necessarily gay. He is more of a metrosexual; the kind of really stylish guys that dress in expensive clothes like they might be gay, but are just really stylish.
I saw a couple funboys headed to the club wearing their cashmere and pink polo shirts.
A metrosexual male who may, or may not be gay. He is however very well groomed, wears expensive stylish clothes, puts some sort of product in his hair, and is slender and athletic.
Oh, you mean that 25 year old funboy who went home with her, made out with her on the bed, but didn't even cop a cheap feel?