pump (third-person singular simple presentpumps, present participlepumping, simple past and past participlepumped)
(transitive) To use a pump to move (liquid or gas).
I've pumped over 1000 gallons of water in the last ten minutes.
(transitive) (often followed byup) To fill with air.
He pumped up the air-bed by hand, but used the service station air to pump up the tyres.
(transitive) To move rhythmically, as the motion of a pump.
I pumped my fist with joy when I won the race.
2010, Jack Engelhard, Indecent Proposal - Page 229
Then he raised her and turned her around and as she pumped from a sitting position his left hand palmed her left breast and the ringers of his right hand were jammed inside her cunt along with his upright penis.
(transitive) To shake (a person's hand) vigorously.
(transitive) To gain information from (a person) by persistent questioning.
The etymology of the term is unclear and disputed. One possibility is that it comes from "Pomp" (i.e. ornamentation), claimed in Skeat & Skeat's A Concise Etymological Dictionary of the English Language (ISBN 9781596050921), and another is that it refers to the sound made by the foot moving inside the shoe when dancing, suggested as a probable source in Chambers's etymological dictionary (James Donald - Published by W. and R. Chambers, 1867). The Oxford English Dictionary claims that it appeared in the 16th century, and lists its origin as "obscure". It has also been linked to the Dutch pampoesje, possibly borrowed from Javanese "pampus", ultimately from Persian (papush) / Arabic (babush) (International archives of ethnography: Volume 9 - Intern. Gesellschaft für Ethnographie; Tijdschrift voor Nederlandsch Indië - Ter Lands-drukkerij, 1870).