Have More Chins Than A Chinese Phone Book Meaning

(humorous) To be exceedingly fat, especially under the chin (as in a "double chin").

Example: 1981, Gerald Clarke, "Show Business: The Long Way to Broadway," TIME, Mar. 30, 1981:
  "This woman has more chins than a Chinese phone book," says Comedian Joan Rivers in a not at all funny pay cable television special.
1995, Doug Robinson, "How about replacing rosters with these subs?," The Deseret News, Feb 25, 1995, section D:
  Our leadoff hitter has more chins than a Chinese phone book.
2004, Andy Kessler, Running Money: Hedge Fund Honchos, Monster Markets and My Hunt for the Big Score, HarperCollins, ISBN 0060740647, page 131:
  My friend, Hank Zona, used to nod his head in someone's direction and whisper, "That guy has more chins than a Chinese phone book."