system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: what is cross-fit and why is it mocked so much?
gpt
Basically, it's a fitness programme/movement of sorts that involves high-intensity interval training and some weightlifting.

It has a negative image among some circles because CrossFit practitioners are seen to be quite obnoxious and obsessive over it, so they won't shut up about it among their friends so much so that CrossFit's like an all-consuming cult. In part, it's due to how CrossFit is structured and advertised as a "lifestyle", with daily workouts to boot so everyday there's always something "CrossFit"-ish the "CrossFitter" friend of yours can talk (and post online) about.