An exclamation usually spoken when you see a really hot girl and you want to let her and the people around you know what you are looking at.
by Ryan December 25, 2004
Something said after a conversational phrase that could be interpreted as a sexual reference is said.
John: "Dude, did you do the Bio assignment?"
Mark: "Yes. That was so hard, it kept me up all night!"
John: "Hey-O!"
Mark: "Yes. That was so hard, it kept me up all night!"
John: "Hey-O!"
by atxlonestar21 September 09, 2009