[give] {sb} the glad eye
1
to look at someone in a way that shows romantic or sexual interest by making flirtatious eye contact
The phrase "give someone the eye" originated in the early 20th century and is rooted in the observation that eye contact and non-verbal cues can be powerful means of communication, particularly in expressing romantic or sexual interest. It is used to describe the act of looking at someone with a suggestive or flirtatious intent. It implies using eye contact and body language to express attraction or interest in a subtle or playful manner.
- She gave him the glad eye across the room at the party.
- I caught her giving me the eye, and I smiled back.
- Don't pretend you didn't give him the glad eye when he walked in!
- They were giving each other the eye all night long.
- He's been giving her the glad eye ever since they met.