You had better believe it!

You (had) better believe it!

exclam. It is true without question! Yes, this is the best, and you had better believe it!

Name	Pronounced	Usage
Yanni	-	Greek
Ethne	-	Irish
Euphemia	yoo-FEM-ee-ə (English)	Ancient Greek, English (Archaic)
Nandag	-	Scottish
Uranus	yuw-RAY-nəs (English), YUWR-ən-əs (English)	Greek Mythology (Latinized)
Hagen (1)	HAH-gen	German, Germanic Mythology