Tie One On Meaning

Example : 1940[1], Hearst's International combined with Cosmopolitan, volume 109, page 77:  "Let's tie one on!" said Peachy gaily. "Come on, Eve!"Eve said she couldn't drink a thing. "Besides, it's fattening!"2004, Paul Theroux, "Books: Damned Old Graham Greene," New York Times, 17 Oct. (retrieved 14 Sep 2010):  Haiti . . . was distressed, tropical, ramshackle, overcrowded, poor and on the brink of civil war. . . . Its ornate hotels were in a state of decay, yet there was enough alcohol available for a guest to tie one on.