A British expression used to signal that a decision is final and the speaker will not entertain further argument — equivalent to 'and that's that' or 'end of discussion.' The word 'flat' here means definitive or absolute, the same sense found in 'flat refusal' or 'flat out.' Now largely dated, it was typically spoken with a dismissive, authoritative tone by someone asserting their position.
A British expression used to signal that a decision is final and the speaker will not entertain further argument — equivalent to 'and that's that' or 'end of discussion.' The word 'flat' here means definitive or absolute, the same sense found in 'flat refusal' or 'flat out.' Now largely dated, it was typically spoken with a dismissive, authoritative tone by someone asserting their position. You might still encounter it in older British fiction or from speakers of a certain generation.
Add your own interpretation of "and that's flat".
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.
See all British & Irish slang slang on Slangora.
Browse all slang words starting with A.
You're not going to that party on a school night, and that's flat.
No comments yet — say something.
A dated British informal phrase used to close a discussion or declare a final decision, equivalent to and that's that. The flat element means definitive and without further discussion. Signals the speaker has made up their mind and will not be moved. Somewhat old-fashioned in register now; more commonly encountered in older British writing and speech than in contemporary use.
She told him he was staying home for Christmas and that's flat — no negotiation, no appeal.
No comments yet — say something.
(UK, dated, informal) And that's that.
No comments yet — say something.