Merriam-Webster Collegiate Dictionary - hog

 I. noun  (plural ~s; also ~)  Etymology: Middle English ~ge, from Old English ~g  Date: 14th century  1. a domestic swine especially when weighing more than 120 pounds (54 kilograms); broadly any of various wild and domestic swine  2. (usually ~g) British a young unshorn sheep; also wool from such a sheep  3.  a. a selfish, gluttonous, or filthy person  b. one that uses something to excess old cars that are gas ~s  II. verb  (~ged; ~ging)  Date: 1769  transitive verb  1. to cut (a horse's mane) short ; roach  2. to cause to arch  3. to take in excess of one's due ~ the credit  4. to tear up or shred (as waste wood) into bits by machine  intransitive verb to become curved upward in the middle — used of a ship's bottom or keel