big cheese

NOUN /bɪg_ʧiz/
10 LETTERS · STARTS WITH B

big cheese is a valid 10-letter word worth 17 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
B3I1G2C3H4E1E1S1E1
3 + 1 + 2 + 0 + 3 + 4 + 1 + 1 + 1 + 1 =17 PTS
DOUBLE WORD → 34TRIPLE WORD → 51
MEANING

What does big cheese mean?