From Longman Dictionary of Contemporary EnglishI rest my caseI rest my casespoken a) formalSCT used by a lawyer when they have finished trying to prove something in a court of law b) RIGHT/JUSTIFIEDused when something happens or is said which proves that you were right – used humorously → rest
Examples from the Corpus
I rest my case• And was his name mentioned anywhere this week following Dublin's defeat? I rest my case.• Industry and nature in harmony? I rest my case.• It is a proven fact, however, that prolonged high altitude reduces intelligence. I rest my case.• Now how many carbons? I rest my case.• Well I rest my case on that one.• Should anyone remain unconvinced, I rest my case on the Leaning Tower of Pisa syndrome.• These others stand on something they said. I rest my case on what I did. 