a dirty old man

dirty old man

An older man who is deliberately outspoken when it comes to sexual topics, to the point of making others uncomfortable. Bob is always making lewd comments to the younger women at work. He's such a dirty old man.See also: dirty, man, old

a ˌdirty old ˈman

(informal, disapproving) an older man who thinks too much about sex: Lots of dirty old men stood around looking at pornographic magazines.See also: dirty, man, old