This deadly blot in thy digressing son.
Shak.
Blot, n. [Cf. Dan. blot bare, naked, Sw. blott, d. bloot, G. bloss, and perh. E. bloat.] 1. (Backgammon) (a) An exposure of a single man to be taken up. (b) A single man left on a point, exposed to be taken up.
He is too great a master of his art to make a blot which may be so easily hit.
Dryden.