someone who thinks about sex all the time► sex maniac informal someone who always wants to have sex or thinks about sex all the time and is unable to control these feelings: · You can't go out with him -- he's a sex maniac.
► dirty old man informal a middle-aged or old man who is always looking at or touching young women or girls in a sexual way: · She was followed through the park by some dirty old man in a raincoat.· One of the school doctors was a dirty old man who always wanted to examine the girls.
► lecherous a man who is lecherous is always looking at, thinking about, or talking to women in a sexual way that is unpleasant and offensive: · He was as lecherous as always, telling rude jokes and trying to kiss all the girls.· Her driving instructor was a disgusting lecherous old devil -- always touching her knee.