have a roving eye

US /hæv ə ˈroʊvɪŋ aɪ/
UK /hæv ə ˈroʊvɪŋ aɪ/
"have a roving eye" picture
1.

avere un occhio vagante, essere un donnaiolo

to be someone who is always looking at other people and is often unfaithful in a relationship

:
He can't be trusted; he always seems to have a roving eye.
Non ci si può fidare di lui; sembra sempre avere un occhio vagante.
Despite being married, he still has a roving eye.
Nonostante sia sposato, ha ancora un occhio vagante.