good girl UK /ˈɡʊd ˌɡɜːl/US /ˈɡʊd ˌɡɜɹl/exclamation 2noun 1forms 1 exclamation2 •Well done, to a female. •Said as praise to an obedient female dog or other female domesticated animal; see also who's a good girl."Fetch! Fetch!" (dog fetches stick) "Good girl!" noun1 •An obedient female dog, child, or someone who behaves like one, even when deemed inappropriate.You're a good girl, standing by your man even when he gets you in trouble. formsgood girls