clap on
verb1
Nautical, Transport To temporarily add something to an existing part, especially to add an additional sail to take advantage of a fair wind.
- We spring out of our berths, clap on a monkey-jacket and south-wester, and tumble up the ladder.1840, R[ichard] H[enry] D[ana], Jr., “CHAPTER XXXV”, in Two Years before the Mast. […] (Harper’s Family Library; no. CVI), New York, N.Y.: Harper & Brothers […], →OCLC:
2
To encourage by (or as if by) applauding.
3
UK, Colloquial To talk at tedious length; to whinge.
- […] clapping on about having to live on a small income because of her son's lack of ambition.2020, Dorothy Cannell, Murder at Mullings: