Offensive: synonym for "retard", "spastic", etc. Used in reference to safety helmets that some severely disabled people wear to mitigate head trauma. Can also be used as a derogative term for an autistic person that weaponizes their condition in order to cry-bully or coerce others.
The Earth isn't flat and vaccines are safe. Stop spewing bullshit, you fucking safety helmet.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.