As a mid-aged Gen-X, 'Chad' when I was growing up was this:

https://en.wikipedia.org/wiki/Kilroy_was_here#:~:text=Chad

Then I did Comp. Sci. at school, and I learned that the whole Chads from punched cards was a thing, so my association with the word changed.

re: Bit Bucket. Again due to my age I guess, it was always a term for where thrown-away data went, along with 'Into the Ether' for lost network packets.