wats an uke and a seme

uke=bottem
same=top

I am positive that a seme is a boy who acts as the man in yaoi. A uke is probably a boy who acts as the woman I guess in yaoi.

"Uke" and "Seme" are Japanese terms. "Uke" refers to the receiving partner или submissive partner in a boyxboy relationship. Similarly, "Seme" refers to the penetrative partner или dominant partner.