Being a sassy-type gay person, causing homo-phobics and other people to label you as such. Not necessarily a bad thing, but it's usually used in a manner of hate and disapproval.
1) That kid is so effluently homosexual... He struts around school like he wants people to know he's gay.
2) Person #1: What a flamer...
Person #2: I know! He's so Effluently Homosexual!