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

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.