put hair on (one's) chest
A humorous phrase said of something very pungent or strong in taste. The idea is that it is so strong that it will "make one a man." These cough drops will put hair on your chest. You'll be cleared up in no time.
put hair on someone's chest
Fig. to do or take something to invigorate or energize someone, always a male, except in jest. Here, have a drink of this stuff! It'll put hair on your chest. That stuff is powerful. It will really put hair on your chest.
put hair (or hairs) on your chest
(of alcoholic drink) revive your strength. informal