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one's ass is grass

An American slang threat meaning someone is absolutely done for — finished, in deep trouble, about to face serious consequences.

ˈwʌnz ˈæs ˈɪz ˈɡɹæshistorical174 viewsLast reviewed Jun 29, 2026+ Add a definition
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#1·Apr 28, 2026

An American slang threat meaning someone is absolutely done for — finished, in deep trouble, about to face serious consequences. Usually said with full conviction: "Your ass is grass" means the speaker intends to make sure you suffer. It implies both the speaker's power to act and the target's complete vulnerability. Classic playground threat energy, but it shows up in adult confrontations too.

Origin: American slang, mid-20th century; "grass" likely rhymes with or alludes to the target being mowed down. Often paired with "and I'm the lawnmower." Editorial expansion authored on Slangora.
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#2·Apr 27, 2026

(US, slang) One is doomed (used as a threat).

For parents

"one's ass is grass" means: One is doomed (used as a threat).. This is informal slang, common in casual speech, texting and social media, but not appropriate for school work, applications or professional settings. There is no real cause for concern in itself; it is everyday peer vocabulary. If your child uses it, a light comment about audience and register is usually enough — no need to escalate. Context, more than the word, tells you whether to follow up.

For ESL learners

"one's ass is grass" means: One is doomed (used as a threat).. Register: informal slang, fine in casual conversation, texting and social media but not in academic essays, business writing or formal speech. Note the regional or dialect label (US) — usage may sound odd outside that variety. A common non-native mistake is to use the word in the wrong register, or to assume one fixed meaning when it is actually polysemous; always check the surrounding register and the audience before producing it yourself. In formal writing, prefer a neutral synonym or a short descriptive phrase, and use this word only when you have heard or read it being used naturally in a comparable context.

Cluster: food_drink
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🗺️About Regional & Other slang

Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.

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