1.  cocksucker(n = noun.person) - a person who performs fellatio;
is a kind of sensualist

2.  cocksucker(n = noun.person) asshole, bastard, dickhead, mother fucker, motherfucker, prick, shit, sob, son of a bitch, whoreson - insulting terms of address for people who are stupid or irritating or ridiculous;
is a kind of disagreeable person, unpleasant person

1.  a worthless or despicable person; -- intended as disparaging and invariably offensive. [WordNet 1.5]

2.  a person who performs fellatio. [WordNet 1.5]