clag

noun

1. (uncountable)A glue or paste made from starch.
2. (uncountable)Low cloud, fog or smog.

   “The sky was thick with dirty gray clag”

   “This programme included practice interceptions, simulator training, day flying, night flying, clag flying -- in addition to […] [a footnote states that clag flying was Air Force slang for foul weather flying.]”

   “We went along in the clag for what seemed like an eternity [a footnote defines clag as low cloud cover]”

3. (uncountable)Unburned carbon (smoke) from a steam or diesel locomotive, or multiple unit.
4. (slang, uncountable)Bits of rubber which are shed from tires during a race and collect off the racing line, especially on the outside of corners (cf. marbles).

   “He ran wide in the corner, hit the clag and spun off.”

verb

1. (obsolete)To encumber

   “As when the orchard boughes are clag'd with fruite”

   “Can such draw to me/My stund affections all with Cinders clag'd”

2. To stick, like boots in mud

   “Wash the rice well in two waters, if you don't wash 'em, 'e will clag [clag means get sticky] and put 'em in a pot of well-salted boiling water.”

3. (Geordie, Teesside)To hit