jocks noun[plural only]2 •(Australia, slang) Male briefs."Please, Ryan. I don't want to come downstairs every morning and find you lounging around in your jocks on my couch. It's too ... studenty." — 2015 •(Ireland, slang) Underwear.She didn't have time to shower, let alone change from her jocks. She pulls her hair backward in a knot. — 2015
