Used as an answer for someone asking you why you did betray them while you two (or more people) where a Team in a game where playing in teams wasn't an option but you decided to be team anyways, the answer makes reference that, even being a team, at the end of the game, it was still Everyone vs Everyone, and you only used them just to achieve your goals easier via manipulation, trickery, and similar
Guy A: *gets killed by his partner while playing Skywars* DUDE, WHY DID YA KILL ME?
Guy B: because it's KILL OR BE KILLED buddy, and you FELL IN MY TRAP
(v.)A medical treatment/practise that will either heal the patient or kill them.
Steams from battlewound-fever treatment. This would involve putting the subject in an icewaterbath, then wrapping them in wool. It worked very well and very quickly, but it put tremendous strain on the heart, and many people suffered heart attacks or complete cardiac arrest.
Kill or cure is the only way to save him. Otherwise, you better pray for him.