back shutter

12 LETTERS · STARTS WITH B

back shutter is a valid 12-letter word worth 22 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3A1C3K5S1H4U1T1T1E1R1

3 + 1 + 3 + 5 + 0 + 1 + 4 + 1 + 1 + 1 + 1 + 1 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does back shutter mean?