“Going commando” is a way of saying that you're not wearing any underwear. ... So when you're not wearing any underwear, you're, well, ready to go at any moment — without pesky undies in the way.
Is it better to wear a thong or go commando?
It's actually probably safer to go commando than to wear thongs.” If that isn't enough to deter you, maybe this will: “If you have a little bacteria — E. coli is the most common bacteria in the colon — in the back part of the fabric and you're physically active, that material may move,” Dr.Apr 24, 2018
Where does go commando come from?
The phrase to go commando originated in U.S. university slang—apparently at the University of North Carolina. The earliest occurrence in the OED dates from 1974: Current U.N.C. Slang (University of North Carolina, Chapel Hill) (typescript) Spring Go commando, to be without underwear.Apr 21, 2019