The Eye-Reach-Around is an ocular manouver made by a guy trying to get a look at a women's buttocks. This is a tricky move because it requires a man to get a glimpse at an angle that is not obvious to the girl who knows she has a big ass. Also, you are generally speaking or facing the girl.
A boy and girl are talking and the guy or girl moves and the eyes look down and to the side and focuses where an illusion is created. The eye actually looks like it is reaching around.
This guy was talking to me and he made an Eye-Reach-Around to my ass.