A male with latent homosexual tendencies who enjoys the company of other males and listens to German techno music while wearing a button-down shirt with the sleeves rolled up, the collar popped, and sandals. This is adapted from the Simpsons episode "The Curse of the Flying Hellfish" where at the end, Bart and Grandpa are hugging, and the rich German guy calls out to them: "Hey fun boys, get a room." He then drives off listening to techno music.
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.
Group of young, unimaginative boys who all have the same "sucked mango" hairstyle and all wear the same clothes and shoes. The alpha male of the group is usually in the pinkest our loudest coloured shirt.
The collective noun for fun boys is pod.
Look at that pod of fun boys trying to hit on all the ladies