eyeball ping-pong

When two people are taking turns making awkward glances at each other but avoiding direct eye contact; Person 1 will look at Person 2, usually with a side-eye, until the Person 2 looks at Person 1, at which point Person 1 quickly looks away and the cycle starts over. The continuous back-and-forth resembles that of a game of ping-pong. Typically indicates some kind of tension between the two involved parties.

Guy 1: Dude, I saw my ex yesterday.

Guy 2: Yikes, how did that go?

Guy 1: It actually wasn’t that awkward, but we were doing a lot of eyeball ping-pong. I wonder if there’s still anything there.

Guy 2: There's not, you’re just an idiot.