Top definition
A random person who spouts off facts about something that has almost nothing to do with the conversation.
John: So, that guy was HOT! Do you think he bats for the rainbow team?

Sarah: Did you know that the original rainbow flag had the colors turquoise and magenta?

John: What the fuck? Where the fuck did that come from? Friggin' GoogleMouth.
by LikesGirls,HatesPizza June 11, 2011
Get the mug
Get a GoogleMouth mug for your cat Bob.