( informal ) used to say that you are certain that sth will happen :
You can bet your bottom dollar that he'll be late.
( informal ) used to say that you are certain that sth will happen :
You can bet your bottom dollar that he'll be late.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005