when you see a girl in the distance that looks good and she gets closer you realize she is unattractive your face looks like you have alot of lemon heads in your mouth.
did you see mike at the bar the other day he was with a total LemonHead
for an example, see Goodie Mob - Track - Dirty South
"Like my favorite, I call it lemon head delight
That's when you lick off all the yellow and you sell the white"