(obsolete, slang) A bad bill of exchange, drawn on persons who have no effects of the drawer.

To thrust forward one's fist, as in celebration.

A pump which operates by periodically changing the volume of a cavity

The enzyme sodium-potassium adenosine triphosphatase, found in the plasma membrane of all animal cells, that pumps sodium out of cells while pumping potassium into cells.

(chiefly Canada, idiomatic) To praise, encourage, or vigorously support someone.

(Ireland, derogatory, informal) political activity that is more evidently concerned with addressing the immediate needs of the local electorate than with strategy that might affect the national interest.

(chiefly UK) A situation where as many people as possible are required to contribute to some urgent enterprise.

(informal) Premature ejaculator (person suffering from premature ejaculation).

plural of one pump chump

Synonym of draught on the pump at Aldgate