Let's say my friend and I want to bet that something will happen, say, he says his favorite team will win, and I say it will lose. If his team wins, then he will have to make dinner for me, and if it lose, it is the other way around. How do I suggest in English that the prise is dinner? Which one of the following sentences sound the most natural?
Let's bet dinner?
Let's bet on dinner?
Let's bet for dinner?
I will bet you dinner that your team will lose.
What would a native English speaker would say that?