A shortend term for the name used to describe a Grunka-Lunka, who feature prominantly in the Futurama episode "Fry and the Slurm Factory." Grunk is commonly used as an insult (to claim that a person or thing resembles a Grunka-Lunka, or acts like one in anyway.) But is mainly used to replace the phrase idiot, sadcase, fucktard etc, especially if you can't think of another term to call you're friends.
Example 1
Jake: "Hey, you reckon we should go to Matt's house?"
Nathan: "No, you fucking grunk, his house is a shithole."

Example 2
Jake: "Jakea-lakea, spanka-la-matts, lets go over to matts"
Nathan: "No, you fucking grunk, his house is a shithole."
by grunk December 9, 2006
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When grandpa gets in to the liquor cabinet at four in the morning. Probably has a half smoked blunt and is blurting out racist slurs he learned in the Vietnam war. When he finally sobers up he will just say what are you looking at to the closest person near him and take a shot of nightquil and pass out on your couch to start the cycle over again the next day
Child: mom grandpa is scaring me

Mother: don't be a little bitch grandpa is just geting his grunk on
by Grunk fund May 31, 2018
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Act of consuming large quanities of alcohol at a diffent date in time...
We went out and drank last night and we got beyond sober
by Ty March 6, 2004
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1.) Elderly people who are drunk beyond their limit. (Grandparent + Crunked)

2.) When you consume large enough quantities of alcohol that you enter a state where you fall and cant get up, need adult diapers, and have trouble getting an erection, much like a Grandparent.
Damn, I got grunk last night! I pissed my pants and couldnt get it up.
by B. Hurk February 18, 2009
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the unstable and highly dangerous state of an out-of-control ginger - and therefore soulless - person under the influence of alcohol. The ginger's crotch actually burns more violently whilst 'grunk', resulting in uncontrollable sexual urges of which unconcious mingers are often victim.
Hodgo: "why the hell does that stupid ginger keep smelling his fingers?"
Darryl: "hes clearly grunk, didnt you see him drag that passed out whale off into the shadows?"

by bigredranga June 26, 2007
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1.A stain that can't be identified in one's shower or toilet.
2. A large messy fudge dragon left in a clogged john.
1. "Jesus! What's that funky green grunk around the tub drain?"

2. "Damn, I just left the nastiest grunk in your porcelain thrown."
by Niffer and Shaun December 1, 2006
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