[sach1]

https://en.wikipedia.org/wiki/Linguistic_description

Try to understand that there is no individual ownership over turns of phrase, and that they tend to shift around over time. Bugs Bunny turned Nimrod from a byword for a competent hunter into an insult.

This is natural and all of your favorite words have or will be subject to it as long as there are humans to communicate with them.

[riffraff]

Ooooh that's why nimrod is an insult! Now it makes sense! Thank you!

Btw, let me add my personal pet peeve: "egregiously" somehow went from meaning "very good" to mean "very bad" in American English.

In my native language "egregiamente" still has the original meaning so I was confused for a long time.

[cvcount]

Dictionaries - at least the ones I checked - mark the "very good" meaning of "egregious" as archaic. I'm only aware of the "very bad" meaning (in UK English), and was quite surprised, when studying maths, to learn of Gauss's "Theorema Egregium", and that the word could have positive connations.

[willvarfar]

I'm still momentarily paused when kids today say 'shit' to mean 'good' etc. Yeah some words shift in meaning and other words swap in meaning.

[qzw]

Shit (meaning “how true”), shit is veritably the aladeen of words. It can basically mean anything depending on usage, context, attitude, or tone of voice.