nounmass noundialect British
1Sticky mud or dirt.
mire, sludge, slush, ooze, silt, clay, gumbo, dirt, soil
- ‘that weird clag that fills your back yards and covers your roads’
2Fog, mist, or low-level cloud.
mist, mistiness, fogginess, haar, smog, murk, murkiness, haze, haziness, gloom, gloominess
- ‘I was in thick clag and rain by now’
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