the old Adam	the evil supposedly inherent in human nature
Bloody Mary	a drink consisting of vodka, tomato juice,...
the real McCoy	genuine, not a substitute/fake
every Tom, Dick and Harry	an ordinary, undistinguished, or common person
every man Jack	everyone without exception
sweet Fanny Adams	absolutely nothing at all
Barbie Doll	a superficially attractive but stupid young woman
Jack of all trades	a person who undertakes many different kinds of work
Jolly Roger	bandera, the traditional pirate flag consisting of a white skull&crossbones on a black field
Johnny come-lately	a brash newcomer, novice, or recruit