Definition of rap full in English:

rap full

(also wrap full, rapful)

adjective

Nautical
  • Of a sail: positioned so as to be filled by the wind; taut and full. Of a sailing ship, etc.: sailing with full sails. Also as interjection: an order to sail in this manner.

noun

Nautical
  • A state or position of sailing in which the sails of a craft are taut and full. Frequently in "to give (a sail or vessel) a rap full" and variants.

Origin

Early 18th century. Apparently from a first element of unknown origin + full; compare -ful. With use as noun perhaps compare e.g. handful.

Pronunciation

rap full

/ˌrap ˈfʊl/