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]

Common Names:

Name	Pronounced	Usage
Dada	-	Western African, Yoruba
Wandalin	-	Ancient Germanic
Aviram	-	Hebrew, Biblical Hebrew
Goro	go-ṙo:	Japanese
Kirby	['kɜ:bi]
Soroush	-	Persian Mythology, Persian