best do

(had) best do something

ought to do something, had better do something. Mary had best learn to mind her manners. You best listen to what I say.

Name	Pronounced	Usage
Matvei	maht-VYAY	Russian
Lainey	LAYN-ee	English (Modern)
Aleesha	ə-LEE-shə	English (Rare)
Gastone	-	Italian
Jenae	-	English (Rare)
Althea	-	Greek Mythology (Latinized)