look up any word, like timebomb:
 
1.
A wimpy individual, a wuss, sissy, or timid scaredy-cat. Someone who cannot make a move until everything is known beforehand.

Originating from the people on "Wheel of Fortune" who either buy a vowel when it is already obvious what the solution is (thus wasting money), or who buy a vowel too early, well before they'd have a chance of solving the puzzle, and thus essentially buy a free vowel for whoever spins next.
The clue was "A game show", he had

"WH _ _ L _F F _ RTUN _"

on the board, and he bought the three E's before guessing! What a vowel buyer!"

To the car in front of you: "C'mon, you vowel buyer! Pull out into traffic and get going! You'll never have a bigger gap!"
by ksmanning March 07, 2010