go commando

(informal)

to wear trousers with no underpants There isn't time to dress properly - we'll have to go commando.

and go freeball(ing)

in. [for a male] to go about not wearing underpants. (The same as freeball.) Bobby is always going commando. Even when it’s cold.

Slang

To wear clothing without wearing undergarments, especially underpants.

Name	Pronounced	Usage
Domenica	-	Italian
Ningal	-	Near Eastern Mythology
Leofric	-	Anglo-Saxon
Ciro	CHEE-ro (Italian), THEE-ro (Spanish), SEE-ro (Latin American Spanish)	Italian, Spanish
Gioele	jo-EL-e	Italian
Eustachys	-	Ancient Greek