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1.
When someone avoids eye contact by looking left and right alternatingly very fast which arouses supicion of being shifty
I dont trust him man, he's been doing the shifty eyes all day.
by coinroller June 26, 2007
 
2.
kind of creepy look that slightly turns you on.
Natalie definitely got shifty eyes from the hottie at the bar last night.

John and Alison were giving each other shifty eyes during lab.
by sandymaple September 05, 2010
 
3.
Unfaithful eyes. When someone is in a relationship, but they cant keep their eyes from wandering, and checking out other people.
His shifty eyes kept him from ever being in a long-term relationship.
by Katie5 September 18, 2011