Noun
the side on which your vision is limited or obstructed
Source: WordNetblind-side
No Man is wise at all Times, or is without his blind Side. Desiderius Erasmus
He has the greatest blind side who thinks he has none. Dutch Proverb
Also, the Committee’s collaboration with the Vietnamese Customs authorities revealed that, some Ghanaian freight forwarding companies produced fictitious documents on the blind side of the Customs Division of the Ghana Revenue Authority (GRA). Source: Internet
Right, like on that punt return TD called back for a blind side block in which the Pats player blocked a guy facing him. Source: Internet