girls UK /ɡɜːlz/US /ɡɝlz/noun 1phrases 1 noun[plural only]1 •(slang, euphemistic) A woman's breasts.Talk about lucky stripes: This push-up top features pads to provide oomph and make sure the girls stay sunny-side up. — 2008 Phrases with girls boys and girlsUsed to address an audience of children, or (jocularly) of adults.