you'd better believe it
Also, you better believe it. You may be assured, as in You walk ten miles every day?—You'd better believe it! This imperative is almost synonymous with you bet your ass. [Colloquial; mid-1800s]
Words nearby you'd better believe it
you name it,
you never can tell,
you said it,
you scratch my back and i'll scratch yours,
you'd,
you'd better believe it,
you'll,
you're,
you're telling me,
you're welcome,
you've