Bubby

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 in Diary of a Wimpy Kid (book version). Greg reflected it BACK to Archie Kelly in the play.