eyeballer

== English == === Etymology === From eyeball +‎ -er (agent noun suffix) or, for something eye-catching, +‎ -er (patient suffix). === Noun === eyeballer (plural eyeballers) One who estimates or judges based on visual inspection rather than detailed analysis. A voyeur or inquisitive person. An investigator who watches for signs of anything unusual or suspicious. (pool) A secret accomplice who surreptitiously watches the competition and interferes by causing a distraction to prevent the opponent from getting a good shot. Someone who stares at another in order to intimidate them. Something eye-catching or worth noticing.