blot

Etymology

From Middle English blot (“blot, spot, stain, blemish”). Perhaps from Old Norse *blettr (“blot, stain”) (only attested in documents from after Old Norse transitioned to Icelandic blettur), or from Old French bloche (“clod of earth”).

noun

1. A blemish, spot or stain made by a coloured substance.
   […] He was blind; he could not see the stars Glinting among the wraiths of wandering cloud; Queer blots of colour, purple, scarlet, green, Flickered and faded in his drowning eyes. 1918, Siegfried Sassoon, “The Death-Bed”, in The Old Huntsman and Other Poems, London: Heinemann, page 95
2. (by extension) A stain on someone's reputation or character; a disgrace.
   The only blot on this service is that of its Kentish Town connections, which throughout the day in many cases just miss the St. Pancras-Luton stopping trains. 1960 February, “The dieselised St. Pancras suburban service”, in Trains Illustrated, page 95
3. (biochemistry) A method of transferring proteins, DNA or RNA, onto a carrier.
4. (backgammon) An exposed piece in backgammon.

verb

1. (transitive) to cause a blot (on something) by spilling a coloured substance.
2. (intransitive) to soak up or absorb liquid.
   This paper blots easily.
3. (transitive) To dry (writing, etc.) with blotting paper.
4. (transitive) To spot, stain, or bespatter, as with ink.
   The briefe was writte and blotted all with gore,[…] 1566, George Gascoigne, Dan Bartholmew of Bath
5. (transitive) To impair; to damage; to mar; to soil.
6. (transitive) To stain with infamy; to disgrace.
   Blot not thy Innocence with guiltleſs Blood. 1707, Nicholas Rowe, The Royal Convert
7. (transitive) To obliterate, as writing with ink; to cancel; to efface; generally with out.
   to blot out a word or a sentence
8. (transitive) To obscure; to eclipse; to shadow.
   He ſung how Earth blots the Moons gilded Wane,[…] 1656, Abraham Cowley, Davideis
9. (transitive, MLE) To sell illegal drugs, to deal, to push.
   I'm walking down the street, past the coppers on the beat. Past the shotters blottin' weed, clear for everyone to see. 2006-06-26, “Where Ya From?” (track 10), in Who Needs Actions When You Got Words, performed by Plan B (musician)
   What kind of things that you have. When I find out don't expect me to stop. I'll come for the P's that you stack. And come for the food that you blot. 2009-03-17, “Next Hype” (track 3), in All-Star Pars, performed by Tempa T
   Porchy: Blottin' dope on the block, going on these shows. 2014-08-18, “Earth Burns”performed by Porchy,Oxxxymiron