It is SOP for soldiers in combat situations to have their blood type readily visible on their uniform, so that if blood transfusion is required, time is not wasted deteriming blood type. Some units also require any allergies to be visible, and if the Soldier has No Known Alergy (NKA) this info is stated. This is commonly seen on Rangers, Special Forces, Navy SEALS and other elite forces.

Got the covid-19 vaccine

Not Karen Approved. A comment or action that may trigger extreme emotions in someone called Karen. Usually racially insensitive or stereotypical, not always though.

1. A word which can be used in the expression of shock and embarrassment after a mortifying experience such as getting thadded or being mistaken for a hooker.

2. This applies only to the queens of bull dykes, people with the plumber's ass, and the netherworld.

"Never Known As" A term used by someone who is trying to be witty and see if you are listening.