Im ashamed that I know this.
Uke and seme.
Urban dictionary.
Uke
From the Japanese verb 'ukeru' (receive) it's used in anime/manga and fanfiction for the "bottom" or "passive" in a yaoi/shounen-ai (male/male) relationship.
Seme
The dominant partner in a gay male on male romantic relationship in Japanese yaoi anime and manga, doujinshi and fanfiction. The seme is said to 'top' his uke.
Sad that I know, because its about yaoi.
crying