When a person looks at your significant other and the intent in the stare is sexual intimacy, oral, dirty thoughts.
Can also be used when one is staring you down in hopes of intimidation. synonymous with mad dogging.
Hey dude, why the hell are you eye ball fucking my chick. Should I leave the room so you can continue staring at my girlfriend.
After the football coach reprimanded the players and made them run a mile, a few of the players began glaring intently at him. In which the coach responded "If you guys keep eyeball fucking me, I will go to your house and donkey punch your mom. Thanks"