Interested in Language
Jane had eyeballed at me during the dinner-party.
What does this verb mean? the same as "stared at me"?
Jane had eyeballed at me during the dinner-party. (= she directed her eyes at me; implying a number of times when it happened)
Jane had eyeballed me during the dinner-party. (= she looked at me thoroughly; implication of one complete action)
It can also imply that somebody succeeded in doing something, Little Joe kicked the ball (and scored), or that somebody was just trying to be successful at doing something, Little Joe kicked at the ball (but he fell and didn't score).
However, there is no structure "eyeball at something/someone".
You eyeball someone = stare at them in a confrontational manner.
It's an awful expression, slang and probably invented by someone who had not heard of the word stare.
Whether or not you say kick or kick at, you don't say foot the ball, or foot at the ball.
Kick is what you do with your foot, stare is what you do with your eye(ball)