does what it says on the tin
Also found in: Acronyms.
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does (exactly) what it says on the tin
(Something) does precisely what it claims or is supposed to do. Primarily heard in UK, Ireland. This budget hostel isn't glamorous but does exactly what it says on the tin: it gives you a place to sleep at a very affordable price. This no-frills antivirus software is straightforward and does what it says on the tin.