know what's what

VERB
16 LETTERS · STARTS WITH K

know what's what is a valid 16-letter word worth 32 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
K5N1O1W4W4H4A1T1'0S1W4H4A1T1
5 + 1 + 1 + 4 + 0 + 4 + 4 + 1 + 1 + 0 + 1 + 0 + 4 + 4 + 1 + 1 =32 PTS
DOUBLE WORD → 64TRIPLE WORD → 96
MEANING

What does know what's what mean?

VERB · 1 SENSE