Quick answer: craic (Informal · social) — Enjoyable company, conversation, fun, or news. “What’s the craic?” can mean “what’s happening?” or “how are things?” Meanwhile, gas (informal conversational) — Hilarious, entertaining, or absurdly funny in Irish English—as in “she’s pure gas” or “that’s gas altogether.”
1. craic ↗
Category: Across the Atlantic
Register: Informal · social
Regions: IE
Enjoyable company, conversation, fun, or news. “What’s the craic?” can mean “what’s happening?” or “how are things?”
When it fits: Use it in a natural Irish-English social context, or explain the sense when your audience may not know it. Answer a greeting normally rather than literally.
When to avoid: Avoid treating it as a reference to drugs or claiming every Irish person uses it in exactly the same way.
“We stayed for another hour because the craic was good.”
In plain English: The conversation and company were enjoyable.
2. gas ↗
Category: Across the Atlantic
Register: informal conversational
Regions: IE
Hilarious, entertaining, or absurdly funny in Irish English—as in “she’s pure gas” or “that’s gas altogether.”
When it fits: Use “gas” in casual conversation, messaging, or sociolinguistic discussion when the listener shares the register and context makes the tone unmistakable.
When to avoid: Avoid relying on “gas” in formal academic, legal, clinical, or HR correspondence where unambiguous plain English prevents misinterpretation.
“Everyone in the group chat recognized “gas” immediately, even though we had to rephrase it in plain English for the project summary.”
In plain English: Everyone in the chat understood the informal expression (hilarious, entertaining, or absurdly funny in irish english—as in “she’s pure gas” or “that’s gas altogether.”), though we used standard wording in the formal report.
Test both expressions in context
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