The open space between the a female's thighs and groin, usually in a square or triangle shape. These only occur with skinny girls as the thighs can not touch. Also known as a fancy gap.
Ever notice Sarah's dinner bell? You could stick a 2x4 though it and not touch her thighs.
Having such a small penis, that you can bang it up against a woman's vagina like you would a dinner bell.
"Kakama's penis is so small that he can dinner bell his 12 year old girlfriend."