Betty MacArthur

Appearance
Lumpy Old Woman  is a minor character in The Amazing World of Gumball. She made her first appearance in "The Laziest" with The Senior Citizens.

Season 1

 * "The Laziest"
 * "The Kiss"

Season 2

 * "The Colossus"
 * "The Job"
 * "The Watch"
 * "The Finale"

Season 3

 * "The Extras"