When you make eye contact exactly at the same time and you stare for longer than 3 seconds but you have to think of all the dirty things you want to do to that person.

Looking into the eyes of another for far too long, in a lecherous way.

Making eye contact with only your eyes , while thinking of all the dirty things you could do to them.
DTEF=Down to Eye Fuck

1) when you think you see a hot chick and it's a dude with long hair. 2) When you think you see a hot chick from afar, but upon the close up walk by you see that she was a 'good from afar, but far from good'. 3) When you are checking out a hot chick who is walking by, you pause and wait to look as she passes behind you and the chick that actually walks by and you look at is a hag.

When you stare so hard at someone that you might as well have been insde them.

To stare at someone flirtatiously or insinuating sex.

A more intense/seductive version of eye flirting. You find this person extremley attractive and you want to tear them apart right now. Could also be undressing with your eyes.
Licking of the lips may occur.