1.NounA look askance at someone; a look of disdain or skepticism.
"He was giving me the hairy eyeball."
2.NounA fond look at someone while batting one's eyelashes.
"He was telling me about a girl looking at him and he said, "She gave me the hairy eyeball." That meant she liked him.; (Second variation as first used and described on television, in the TV show Hazel 4/6/1962)."