Ill bet a dollar to a donut

Ill bet a dollar to a donut is another way of saying you will bet the same amount of dollars to donuts as the other person; the phrase is often used in places where gambling is common as a literal term but can also be used figuratively to describe betting the same amount of something different. Dollars to donuts is a fake bet where one person will agree to put up the same amount of dollars to the others persons donuts in a bet.