A thumbfart is when you misspell a word in a tweet or text message and send it out without realizing it. Similar to a brainfart when you speak. It's a word created by Dustin Zito of Real World Las Vegas on MTV. Season 25.
"I worked out like a beast today. Tonight I'm gonna need a message!" This is a thumbfart. The word should have been "massage" but "message" was used and sent by mistake.
by meatjockey October 11, 2011