you can bet your bottom dollar

US /ju kæn bɛt jʊər ˈbɑtəm ˈdɑlər/
UK /ju kæn bɛt jʊər ˈbɑtəm ˈdɑlər/
"you can bet your bottom dollar" picture
1.

pode apostar, ter certeza absoluta

to be absolutely certain about something; to be sure that something will happen

:
You can bet your bottom dollar that he'll be late.
Pode apostar que ele vai se atrasar.
If she says she'll do it, you can bet your bottom dollar it'll get done.
Se ela disser que vai fazer, pode apostar que será feito.