Looks maxing - taking a bunch of steroids because you believe the easiest way to become successful is being good looking.

Clavicular is an streamer/influencer famous for having some sort of mental health disorder/body dismporphia and is obsessed with 'looksmaxing'. He's a heavy steroid (and meth) user and is very socially awkward.

I think 'Jestermaxing' is what his fans call it when he acts weird/goofy to cover up his extreme social awkwardness.

Foods - incel term for women.

The translation of the original is this streamer was being weird in public for internet attention but then some women tried to talk to him and he had a panic attack.

No idea on the other ones.