Grunt-Leeches are leeches that grunt. And they suck your blood. They are disgusting. Here’s a list of grunt sounds and their meanings, in case you encounter one:
Grünnt: Hello
Gruntt: Goodbye
Grrunt-grr-untt-untt: Where is the closest leech-hospital?
Gruüunt: Your blood tastes delicious
Grrrrunt: Your blood tastes awful
Ggggrrünttt: I have a headache, even though I don’t really have a head
Grunnnnnnt: Can we be friends?
Grunt-grunttt-grünttttt: I wish I could ride a bicycle