tighter than a duck's ass 

Impermeable. I.e., watertight.

My English teacher is tighter than the proverbial duck's ass.

tighter than a duck's ass by octopod March 4, 2004

the duck's nuts

Amazing, astounding, or impressive. Synonymous with the bee's knees or the cat's pajamas but slightly more naughty.

Isn't that the duck's nuts? That drake just quacked the greek alphabet.

the duck's nuts by Brophy March 12, 2004

the duck's nuts

Really good luck or something great that's hard to find.

I just got into town and found a whole bag o' bones, that's the duck's nuts idn't it Blue Monkey?

the duck's nuts by Irish Cajun March 13, 2004

Donald Duck's Great Journey

What you have to do when you have toilet paper in the house but not in the bathroom and you only realize that after you've shit and you're home alone. Essentially waddling to wherever you keep the toilet paper with your pants and undies at your ankles and shit on your ass and then waddling back hoping no one sees you like this.

The "Donald Duck" part coming from the fact that you're most likely Donald Ducking while doing this

Eric realized he had to restock the toilet paper after he took a Taco Bell shit, thus he now has to either make Donald Duck's Great Journey or wait till someone comes home.

Donald Duck's Great Journey by Guy McDo August 22, 2023

lick my duck’s asshole! 

One of innumerable ways of telling someone to fuck off.

Why don’t you lick my duck’s asshole!

lick my duck’s asshole! by Dr Bunnygirl May 18, 2023

wing wanger for a duck's tail 

Any item or tool whose name doesn't immediately come to you.

"Would you hand me that....that...wing wanger for a duck's tail, so I can finish the oil change."

wing wanger for a duck's tail by jeremy white August 7, 2006

fuck the duck's head until it's exploded 

干爆鸭头

Suppose you are in a Chinese restaurant.
"Which dish do you prefer?"
"fuck the duck's head until it's exploded."

fuck the duck's head until it's exploded by Mr. ssb July 17, 2020