Examples:

• You bet your bottom dollar I did.
• You bet your bottom dollar.
• You can bet your bottom dollar on that.
• Because if that wig isn't found, you can bet your bottom dollar, the sun will not come out tomorrow.
• As you left your house in, let's face it, a bit of a rush, you can bet your bottom dollar that whilst you'd have remembered essentials food, clothing, water you'll have forgotten the most important thing.
• Bet your bottom dollar, I'd have got him right between the eyes.