dirty old man

plural dirty old men

1. derogatoryAn adult male who acts in a lecherous or lewd manner, especially towards people younger than him.

   Always shouts out something obscene / Such a dirty old man

   1969, John Lennon, “Mean Mr Mustard”, in Abbey Road, performed by The Beatles

   3 more examples

   You're nothing but a dirty, dirty old man / You do your thinking with a one-track mind

   1970, “Funkier Than a Mosquito's Tweeter”, in Alline Bullock (lyrics), Workin’ Together, performed by Ike & Tina Turner

   Moving her arm up and down between them, she said in a still louder voice, "Admiral indeed! Dirty old man, if you ask me! He drove his wife to an early grave with his woman chasing. Now he's spending Nancy's money on the likes of her, that slut—that—that naked hooker.

   1974, Henry M. Dupree, The Dirty Old Man, →ISBN, page 14

   If you didn't go for Lila you're some kind of prissy old prude. If you did go for her you were some kind of dirty old man.

   1991, Robert M. Pirsig, Lila