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
Fridwald	-	Ancient Germanic
Eustorgius	-	Ancient Greek (Latinized)
Maimu	MIE-moo	Estonian
Ecgberht	-	Anglo-Saxon
Hammond	['hæmənd]
Giosetta	jo-ZET-tah	Italian