put a lid or cover on
he capped his pen
provide a fitting climax or conclusion to
he capped a memorable season by becoming champion of champions
place a limit or restriction on (prices, expenditure, or borrowing)
council budgets will be capped
confer a university degree on
(especially in African American usage) speak in an untruthful or exaggerating way; lie or exaggerate
does she really have a tape with him or is she just capping for cash?
I feel like the people posting these ain't capping