not by a blame sight

ADVERB
20 LETTERS · STARTS WITH N

not by a blame sight is a valid 20-letter word worth 29 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
N1O1T1B3Y4A1B3L1A1M3E1S1I1G2H4T1
1 + 1 + 1 + 0 + 3 + 4 + 0 + 1 + 0 + 3 + 1 + 1 + 3 + 1 + 0 + 1 + 1 + 2 + 4 + 1 =29 PTS
DOUBLE WORD → 58TRIPLE WORD → 87
MEANING

What does not by a blame sight mean?

ADVERB · 1 SENSE
1

Definitely not.