a jolly, kind and caring person, usually loved by everyone and the community around them. since the silly name, it’s also used on someone that’s funny or a clown.
“haha!!! you’re so funny!! you’re a jokester, a clown, a jammahehe!!”
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi