When a woman spreads her legs in a
seductive manner to let a man know that she wants to have sex
with him.
Textbook example of "gappetizer":
Sharon Stone in the movie "Basic Instinct".
After I saw her throw me that gappetizer,
I knew it was going to be a great night for me!
She gave him a little "gappetizer" to get his
attention and
thought to herself,"He's mine now Bitches!"