The word was originally for large, badass guys who travel with you in the Australian bush and kick ass for you if anything, man or beast, gives you any problem.
Outback guy sitting on log drinking beer: Cheers Mate!

Badbuy: Shouldn't you have bought a gun instead of beer?

Outback guy: No, I don't need a gun I got a Donk.

Badguy seems perplexed: Whats a Donk?

Donk right before he knocks him out with one punch:

by BurtonReingold October 29, 2009
To throw up
I was drinking my chocolate milkshake and then i donked everywhere. My cat donked all over my bed sheets last night. If you donk in my car your walking home.
by Benliambillytom September 30, 2013
Big big big big ass. Like super XXXL ass.
The girl I blasted last night, had a donk.
by Asian Profession April 06, 2009
n. a contemptibly foolish incompetent or stupid person, a jackass

v. of or acting like a jackass
Ben is such a donk, he's always losing shit and blaming other people.
by donkin' February 05, 2010
The sound a Donkey makes when it has a bucket on its head.
by BirdLover637 May 12, 2012
A name given to only the finest and most crazy badass in the world. He must know random facts that makes him look very smart. He must be able to get wicked drunk off of twisted tea and beat the shit out of random peoples trucks. He is a man of mystery..
Ryan: "Did you know the average penis size of a white male is 6 inches..?"

Anthony: "Nope.. but you are now the new Donk."

Donk: "I'm the fucking man!"
by Antonio69s December 06, 2010
A name given to a person who acts in a manner adverse or inconsistently to the situation at hand or with people present. At that, this person has opened him/herself to the utmost radical degree of criticism. This most likely results in the person killing him/herself. At best, this person abstains from any kind of contact with any person due to the fact that everyone would most likely want to donkey punch him/her.
Alex: Hey guys what's up!
Dito: Nothing much man just chilling having some drinks.
Alex: Can I buy you a pitcher of your choice please? After all you invited me to this bar.
Dito: Hey Bob, come over here. Is this guy gay?
Bob: No man, I'm pretty sure he's just a donk.
Dito: Oh okay, I was about to stick him in the face.
Alex: Hey! thats not ni...
by Ralphi September 12, 2010

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