Blot  —n. 1 spot or stain of ink etc. 2 disgraceful act or quality. 3 blemish. —v. (-tt-) 1 make a blot on, stain. 2 dry with blotting-paper.  blot one's copybook damage one's reputation. Blot out 1 obliterate. 2 obscure (a view, sound, etc.). [probably scandinavian]