Oh, who: Americans, see sources I guess they’re all American. Where: I’ve heard it used in Britain too, so ‘the American hegemonic cultural west’ I guess. Since when: not a clue.
For what it’s worth, I heard the term ‘fist bump’ specifically for the act of fist bumping long before I heard of ‘daping up’. When I hear ‘dap’ it has almost always, I think actually always but I can’t be sure, included one of those hand clasps. A fist bump is just a ‘fist bump’. It’s strange what percolates out from the dominant culture.
When I hear dap up I just think of that ‘in the hood’ series time stamp 2:47. Dap up, that hand clasp thing, no fist bump.












Past, you should probably read that book you’re quoting.
Newspeak was the idea that removing words from people’s vocabulary would remove the thoughts from their head, therefore becoming an avenue for control. Despite the Sapir-Worf hypothesis being bunked, I don’t think it was at the time.
What words were they removing from your vocabulary, how do you believe it is controling you? Modern examples would be something like ‘Unalive’ I guess, but not really. Sponsors trying to get you stop using the word dead, and talking about death. But, unalive is a work around, not enforced, so not really newspeak.