- Ah, good thing that Food Nipple is waiting for me in the starship, cos man have I worked up a big, grunty, thirst.
- — The Thirsty Grunt after drinking millions of gallons of gruntiness
The thirsty Grunt became the thirsty grunt after getting lost in the AIDS infected POA. Master Chief gave him some booze and drove away. Motivated by nipples, he escaped the explosion, and stowed away on Master Cheif's ship. Due to being caught, he later escaped and went back to Balaho and had a happily ever after. Yay!
The Thirsty Grunt is actually a trap set by bungie, because after Master Cheif finds the grunt, ten seconds have passed. When you listen to the grunt, another ten seconds have passed. This way, you will lose the level, and you will never finish the game, causing you to go insane until you do. And, when you finally beat it, it has taken you seven tries, which is Bungie's control number, and your mind is sucked into the game. (Where do you think the flood come from?)