jewels UK /ˈd͡ʒuːəlz/US /d͡ʒulz/noun 1phrases 1 noun[plural only]1 •(slang, euphemistic) Family jewels; testicles.Murray, if I wasn't so crazy about you I'd give you a kick right in the jewels. — 1991 Phrases with jewels family jewelsThe testicles.