Know Your Onions

A glorious piece of 1920s slang, to know your onions is to know what's going on.

PERSON 1 “How come you know about my new job at McDonald's?”
PERSON 2 “I make it my business to know what's going on.”
PERSON 1 “Wow, you really do know your onions.”

by C L G July 04, 2021