bottom dollar
is the last dollar.) •I'll be there. You bet your bottom dollar.
•I bet my bottom dollar you can't swim across the pool.
•You bet your life I can't swim that far.
|| I'll bet my bottom dollar he'll be back tomorrow. — Я совершенно уверен в том, что он завтра вернется.
This horse will win. I would bet my bottom dollar on it.