From Middle English culme, colme, of unknown origin but probably from or related to Old English col (“coal”). Related to culm and Icelandic kámugur.

coom (uncountable)

1. soot, smut
2. dust
3. grease

• becoomed

• “cǒlme”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007.

See come.

coom (third-person singular simple present cooms, present participle cooming, simple past came, past participle coom)

1. Pronunciation spelling of come.
   • 1838 March – 1839 October, Charles Dickens, “Illustrative of the convivial Sentiment, that the best of Friends must sometimes part”, in The Life and Adventures of Nicholas Nickleby, London: Chapman and Hall,[…], published 1839, →OCLC, page 411:

     “Not a bit,” replied the Yorkshireman, extending his mouth from ear to ear. “There I lay, snoog in schoolmeasther’s bed long efther it was dark, and nobody coom nigh the pleace. ‘Weel!’ thinks I, ‘he’s got a pretty good start, and if he bean’t whoam by noo, he never will be; so you may coom as quick as you loike, and foind us reddy’—that is, you know, schoolmeasther might coom.”

From Scots coom, of unknown origin.

coom (plural cooms)

1. (Scotland) The wooden centering on which a bridge is built.
2. (Scotland) Anything arched or vaulted.

• coom-ceiled

An alteration of cum. See also coomer.

coom (uncountable)

1. (slang, sometimes humorous) Semen.

coom (third-person singular simple present cooms, present participle cooming, simple past and past participle came or coomed)

1. (slang, sometimes humorous) To ejaculate.

• COMO, Como, MOOC, MoCo, moco