Bubby is a name that Manny calls Greg because he can't pronounce "brother". The only time he doesn't is in The Last Straw (Although, he calls him Ploopy) Dog Days and The Ugly Truth. Manny called Greg "Bubby" out loud in "The Wizard of Oz" play. Greg reflected it back to Archie Kelly in the play. After the play’s events, people in the hallways started calling him “Bubby”, sometimes pushing him.