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used when someone asks you to do something you don't have time to do. typically used when you are in the middle of planning a large project, or are otherwise really busy.
1st guy: "can you pick up a sanwich for me?"

2nd guy: "not today dude! I've got shit to do!"
by quebert September 13, 2007

Words related to not today dude

ain't happening good luck not doin' it no way ntd