1) when you think you see a hot chick and it's a dude with long
hair. 2) When you think you see a hot chick from afar, but upon the close up walk by you see that she was a '
good from afar, but far from good'.
3) When you are checking out a hot chick who is walking by, you pause and wait to look as she passes behind you and the chick that actually walks by and you look at is a hag.