Popularized for a grand sum total of 7 minutes during a run of an Aqua Teen Hunger Force showing on Adult Swim in which Meatwad starts droppping izzle's when Frylock tests out his super toilet on Carl.
Literally means 'damn thief' but is more used in a situation where someone is trying to rip you off.
Item has 50p sticker on it: I go to the till:
Shopkeeper: Thats £1.
Me: Its 50p!
Shopkeeper: no no, price is wrong...insert rubbish excuse here
Me: Diamn teef.