Double Dammit 

A stronger curse than the regular dammit, used mainly at an accident or large mistake, also called the double D word.

Ah Double Dammit, I broke my bottle off inside of that girl.

Double Dammit by Ruin April 13, 2005

Double Damnit 

An expression used when the ordinary damnit just won't do or has already been used. If one has already used the word Damnit and is in need of a new curse word then then 25 seconds later, one must succumb to the word Double Damnit. Traditionaly used in the game of golf when one thinks that nobody is around because one is too embarassed to admit that it truely is a dumb curse word.

(Tee's off a slice) Damnit!!!! (Does it again) Double Damnit!!

Double Damnit by BigBennyT09 November 3, 2010