A misspelling of the word, drugs. You misspelled it to either be funny, an idiot, or using them when you spelled it.
Also, an addon to a popular computer game, Garry's Mod
1. Alpha: Got some drugz?
Beta: No man, anybody got durgz?
Charlie: I have drugs
*Alpha and Beta take Charlie's drugz- I meen drugs*
2. Delta: HAY GUYS! I just got Durgzmod!!!!11!!1one