ding-dang
Used when you see a hot girl and you don't want her to know that you and your buddy are talking about her being hot.
The first guy that sees her will say "Ding-Dang" and if his buddy agrees that she is hot he will say "Ringy-Dingy"

If the friend disagrees he can use the antonyms of blockermore or butterface.
Heh check out this girl walking towards us, Ding-dang!
