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1.
your boss or someone of the like who is a person that cannot be respected and is mostly a loose, escort riding asshole.
Wow, does that buttsexer think that we don't know, that he is looking at porn in there?
by Rbone March 04, 2005
 
2.
a faggish guy that likes to recieve butt sex.

its a noun.

an insult you can use to make fun of someone.
"hey i'm john and i like butt sex."

"Then you are a butt sexer!"
by beast82 May 19, 2009