what's what

(spoken)

the information about a person or situation You finally met her boyfriend, so now you know what's what. He's been in this business for a long time and really understands what's what. It will be hard for investors to tell what's what in the current stock-market crisis.

what's what

Informal

The fundamentals and details of a situation or process; the true state or condition.

Common Names:

Name	Pronounced	Usage
Lucille	loo-SEEL	French, English
Gisilbert	-	Ancient Germanic
Etel	-	Hungarian
Martine	mar-TEEN (French), mahr-TEE-nə (Dutch)	French, Dutch, Norwegian
Branwen	BRAN-wen	Welsh, Welsh Mythology
Torvald	-	Swedish, Norwegian, Danish