Me Three Meaning

(idiomatic, humorous) Used to express agreement, after someone has already said "me too".

Example: 1982, Richard Kluger, Un-American Activities, Doubleday Publishing, page 524
  â€œ...Come if you can—he’d like that a lot.” / “Me, too.” / “Me, three.” She gave a girlish giggle and unlocked her door.
1995, Jeanne Betancourt, Give Me Back My Pony, Scholastic Paperbacks, ISBN 0590485865, page 16
  â€œI hate saying good-bye,” Lulu said sadly. / “Me too,” Pam said. / “Me three,” Anna said.
2006, Michelle Murphy, Sick Building Syndrome and the Problem of Uncertainty: Environmental Politics, Technoscience, and Women Workers, Duke University Press, ISBN 0822336715, page 1
  Perhaps a first worker complained about an aspect of their work environment, and others chimed in—Me too, me three!