Originally used by 3D Realms as the "release date" for the game Duke Nukem Forever, it basically just translates to either "we don't know yet" or can be jokingly used in the context of indefinitely delayed/Early Access games.
Random Dude1: "So when's Star Citizen going to come out of Early Access?"
Random Dude 2: "When It's Done!"
A long and strange way my friend says "I did it". Most say it's from Jojo,most say it's from the band ACDC. Surprisingly it also came from a SML video "Black Yoshi's kids" where Black Yoshi says "Not if they ain't know who be dones did it" at 8:17 (It's not even hard to tell it came from him)
From Discord 7/9/21
Friend 1:You stole my body pillow 6 time and you gonna tell me that?!
Friend 2:Don't be all them talks like I dirty deeds done dirt dids it to be them emo maddafakkas!