vulgar slang To not wear underwear. Typically said of a male. "Balls" is a slang term for the testicles. Dude, I don't have any clean underwear, so I have to go freeballing today.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
See go commando
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.