What does In and Out Teaser mean in betting?

An In and Out Teaser is a type of teaser where the player moves the line in their favor across several selections inside one combined bet.

How does it work?

The core idea is the same as with a regular teaser: the player gets more favorable spreads or totals, but pays for that with a reduced payout. The point is that several lines are shifted into a more comfortable range, making the ticket look softer in terms of what needs to happen. But there is still one hard rule: every leg must win, or the whole bet loses. In simple terms, it is a more forgiving-looking combined market, not some free form of protection.