A sleazboy is a smooth taking, barfly
and nightlife junkie
extrovert who always knows where the party
is at, who the easy girls
are and how to to queue jump
and be on guest list
at all the nightclubs. An operator
who always know where the free score
is. It can be used as term of endearment in certain circles.
Possibly derived from the Irvine Welsh Novel Trainspotting
where the characters names had the suffix -boy i.e. Rentboy, Sickboy as is common with nicknames in inner city Scotland.
That smug looking sleazeboy over there at the bar, was the one who slept with my girlfriend's sister in the club toilets.