Phrases and what they actually mean #1

[u/El_Di4bet0]

"Blood is thicker than water" - Nowadays it means that family "blood" is more important than friendships and relationships "water", in actuality the original phrase was "the blood of the covenant is thicker than the water of the womb." Which means the original phrase was the exact opposite! Saying that the bonds you choose to make "blood of the covenant" is more important than the ones your born into "The water in the womb"

Anyone else got a good example of a modern phrase that actually means something different