caper:

The unopened flower bud of the caper bush. Usually pickled in vinegar or brine and tarragon, capers are used to season sauces, cold meats and fish. Their flavor is peppery, sharp and salty-sour, with the finest flavor found in the smallest buds.

caper:

A frolicsome leap or spring; a skip; a jump, as in mirth or dancing; a prank.