Named after a popular South African sport-fish (Spotted Grunter - Pomadasys commersonni) which is known for grunting like a pig when landed, a grunter is a very unattractive woman.

The term is so widely used that young men developed a game called 'Hunt the Grunt' whereby each player adds money to a pot and the aim is to score the ugliest girl/woman possible on any one night. At the end a winner is decided by popular (unpopular) vote and he takes the pot. It is then his decision whether or not to buy his grunter a drink with his winnings.

Someone who used to be a potential girlfriend/boyfriend, but no longer is.

A girl that is just lower than low, uglier than ugly, and all-around hard on the eyes.

The man on the receiving end of anal sex. See also shunter.

an upsized poo that is simply too large to be expelled without grunting, clenching, and the bursting of facial blood vessels.
"dropping a grunter" is the act of producing one of these intimidating steamers.

A right rough old dog, with yellow bleached hair, 5 inches of greasy roots and no intellect, who's been fucked left, right and centre by thick, ugly, tattooed, toothless neanderthal-type blokes all her life. She's had more pricks than a second hand dartboard. You wouldn't touch her with yours or anyone else's.

A Grunter, is someone who is very ugly and usually has a huge bottom jaw. When you look at a grunter its almost impossible to not picture them acting like an ape throwing the poo everywhere. There are different levels of grunting, a high level grunter would deemed, "He Grunts On A University Level" whereas most just grunt on a 6th grade level.