This Brooklyn barkeep never stops flapping his gums.

And now toothless bartender Jamie Mandel, who lost his pearly whites in a car crash years ago, is talking up his promise to play a jaw-dropping 15 hours of nonstop pub ping-pong in order to raise $35,000 for a new set of choppers.

The cheeky mixologist said he will grin and bear the grueling table-tennis marathon for $20 a game at B61 on Columbia Street in Red Hook next Saturday starting at 1 p.m.

The gummy dare “is so I don’t have to be in debt,” said the popular publican, who hopes new implants will also improve his chances at online dating.

“When do you tell a girl you are missing nine teeth? Do you tell them in an e-mail before the date?” mused Mandel, 34.