attagirl in English dictionary attagirl Meanings and definitions of "attagirl" (idiomatic, colloquial) Female version of attaboy, used to show encouragement or approval to a girl or woman. interjection (idiomatic, colloquial) Used to show encouragement or approval to a girl or woman. Female version of attaboy. more Sample sentences with "attagirl" Declension Stem Try again Available translations Czech Estonian Finnish Polish Spanish Authors