A nit is someone who talks a lot, but won't back up their talk with any bets on the table, no matter what spot or handicap they are offered. They are a blow hard, the type of guy who has diarrhea of the mouth (or keyboard) and yet never has anything useful to say. Ever.
You can identify the biggest nit in the pool hall because it will be the guy no one likes, everyone avoids/tries not to talk to, and yet he'll be the one too dumb to notice and also the loudest busybody in the place. Jerks and a-holes are generally smart enough to know people hate them, so that's the difference between them and a nit.
And as Chopstick says, every pool hall has at least one.
You can identify the biggest nit in the pool hall because it will be the guy no one likes, everyone avoids/tries not to talk to, and yet he'll be the one too dumb to notice and also the loudest busybody in the place. Jerks and a-holes are generally smart enough to know people hate them, so that's the difference between them and a nit.
And as Chopstick says, every pool hall has at least one.
