An expression for disappointment meant to be used as a facial expression, not an actual saying. But low speed people still say "Eye roll" even if it is perfectly in their capacity to just roll their eyes. Also, the term has a hidden sexual connotation, and therefore, should not be used as a part of speech.
Luis: I forgot my math homework!
Rita: EYE ROLL!
Luis: Woah...no I do not want to have sexual relationships with you behind your boyfriends back, don't be gross....