the one who I N S E R T S inside their partner (mostly homosexual couples)

A man who likes giving anal intercourse to other men rather than receiving.

A person of any above description who "takes the lead" or is dominant in sexual situation. May or may not include S & M, fantasy role play or fetishes or servitude. May or may not want to be touched. Will initiate sex. If includes S & M, the top will be the one to do the bondage & pain play etc. to the bottom.

The act of oral sex, originating out of new york

As a verb, to be the top (noun) in gay sex. Typically, to be the guy who inserts his penis in the partner's anus.

Louis Tomlinson.

The act of giving or receiving oral sex. A reference to the top of someone's body is the "head".