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blackgrass

Blackgrass has two distinct regional meanings.

ˈblækˌɡɹæs66 viewsLast reviewed Jun 29, 2026+ Add a definition
🇬🇧 British & Irish slang
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UK
#1·Apr 28, 2026UK

Blackgrass has two distinct regional meanings. In the UK, blackgrass (Alopecurus myosuroides) is a seriously problematic grass weed that infests wheat and cereal crops, causing significant yield losses and notorious for developing resistance to herbicides — a major agricultural concern in arable farming. In the US, blackgrass refers to a salt marsh plant (Juncus gerardii or similar species) used historically for facing and stabilising dikes. The UK agricultural sense is by far the more culturally prominent in current usage.

The blackgrass in the south field had developed resistance to the standard herbicide, leaving the farmer with few options.
Origin: Descriptive name for the dark-seeded grass weed (UK) or dark-stemmed marsh plant (US); the name describes the plant's appearance. Editorial expansion authored on Slangora.
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UK
#2·Apr 27, 2026UK

(US) , a salt marsh plant used for facing dikes.

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UK
#3·Apr 27, 2026UK

(UK) , a weed that harms wheat crops.

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🇬🇧About British & Irish slang slang

UK and Irish slang — Cockney, Scouse, Geordie, Yorkshire, Glaswegian, Brummie, Welsh, West Country, plus Irish English. Centuries of regional dialects feeding into modern British and Irish street talk.

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