Ate The Carrot
From Frikipedia
An individual or group who has selected a clearly wrong choice can be said to have eaten the carrot.
Example
Eddie: "For one mullion dollars, how many in a bakers dozen? A, 15? B, 13? C, 3.14159265? D, 12?"
Gomer: "C lockitineddie"
Eddie: "Oooh, you just ate the carrot"
