Actualy, this word came to Russia from tatar(turk) language, as alot others trash words. Why exactly ебать(ебат), became "native" in Balkans I dont know,but as I understood, it means a different means. In russian language this word use very often, but only the one way. Ебать means to fuck. Хуй(huj) means the cock, the dick. I want to advice to you all, to use the word huj also. It makes your language more rich! Ask me anything about trash words.
KLL