| HP or h.p. | |
| —abbreviation for | |
| 1. | (Brit) hire-purchase |
| 2. | horsepower |
| 3. | high pressure |
| 4. | (in Britain) Houses of Parliament |
| h.p. or h.p. | |
| —abbreviation for | |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a gadget; dingus; thingumbob. |