Teaser bets are basically special parlay bets. Many sports books offer teaser bets and they are very popular amongst online sports bettors. Let's assume that you are a fan of betting on basketball. A sportsbook might offer an 7 point teaser bet on a Chicago Bulls vs Detroit Pistons game. Let's say the spread for the game is Chi -4, Det +4. Since a teaser bet is a form of a parlay bet you will have to combine it with another type of bet. We will use an over/under bet in this example. 
Bodog - Bodog is easily the best sportsbook for teaser bets. They are extremely creative with their teaser bets and they always pack them with a lot of value. Bodog accepts US bettors and they also manage a nice sized poker room and 
BetOnline - Betonline is another great sportsbook for teaser betting. The teasers at Betonline always offer great odds. This sportsbook has won many awards and is currently the fastest paying US bookmaker. They are also the easiest sports book for bettors from the U.S.A to deposit at. Players that use our link will receive a 25% bonus on their first deposit. 
Bet 365 - Bet365 does not accept US bettors but they are the top bookmaker in the United kingdom and most of Europe. They offer a wide range of teaser bets on basketball, football, soccer and many other sports. They are one of the largest online gambling companies in the world so they can afford to take care of their customers. Our special bonus at the Bet365 sports book is a 100% bonus up to $200. My Best Sports Betting Tip:
It is always important to remember that the lines offered by an online bookmaker do not reflect the expected outcome. The handicapper creates the lines with the sole purpose of getting an even number of bets on each outcome. The bookie makes their money from the vig, or juice. The vig is the small fee charged on each bet. With this in mind you will need to find the spreads and lines that do not seem accurate. If a point spread doesn't seem to make sense that means the bookie likely made a mistake and that you should place a wager.
The Best NBA Sports Book?
In my honest opinion Bodog is the best sports book on the Internet for NBA basketball betting. The reason why I think that6 they are the best basketball sports book is because they offer great lines and they accept wagers on just about everything. They also offer in-play betting, a real time betting platform that enables you to bet while the game is being played.
Not too many sports books even come close to offering such a wide range of NBA basketball bets.
Best NFL Sports Book?
One bookmaker stands out when it comes to betting on the NFL. BetOnline is home to the best NFL football lines and prop bets online. You will receive more points and the payouts will usually be higher when you bet on the NFL at BetOnline.
NFL betting at BetOnline can be done using their regular platform or their in-play platform that allows you to bet in real time.