grunter

noun

1. One who grunts.

   “Dalton, the winner of nine grand slam doubles titles, claims she would have been prepared to forfeit a match against the grunter par excellence, Maria Sharapova — and has urged the current generation of tennis players to do so.”

2. Any of a group of fish of the family Terapontidae, which make a grunting sound when caught.
3. (slang)A pig.

   “We did but keep you surety for our son, / If this be he, — or a draggled mawkin, thou, / That tends her bristled grunters in the sludge[.]”

   “A pig fight on board ship has always amused me very much: stand on the bridge, and look down into the crowded pen of grunters […]”

4. (dated)A hook used in lifting a crucible.