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
StefÁN	-	Icelandic
Lenore	[lə'nɔ:]
Wiseman	['waizmən]
Odell	o-DEL	English
Athene	-	Greek Mythology
Hamnet	-	English (Archaic)