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
Matej	-	Slovak, Slovene, Croatian, Macedonian
Khariton	-	Russian
Islay	IE-lə	Scottish
Sven	SVEN	Swedish, Norwegian, Danish, German, Dutch
Ryouta	ṙyo:-tah	Japanese
Fikriyya	-	Arabic