Mongoloid Duckling 

When in a group of offspring, be them human or animal, all of them are near perfect. Except one, which is exceptionally and completely fucking retarded.

Dude, did you see those insanely hot triplets over there?

Who the fuck are you talking to?

Well, there's four of them, but the last one is a Mongoloid Duckling.

Fuck it, I'm going home.

Mongoloid Duckling by Sodomy Boy October 26, 2010

duckling 

the coolest duck in the world with the nicest duck butt; sticks in the air while walking like a duck

Yo yo, daym that duckling sure looks mad fly walkin' down the street.

duckling by Jen xP May 4, 2004

Dr Duckling 

A floating duck who floats in people's pools he turns into jake jr when you put a phillies cap on him. He protects the diving board.

I love dr duckling

Dr Duckling by Shaq Diesel47 July 19, 2014

Mud Duckling 

Odd looking offspring of a mixed couple. Usually people who are mixed with the White and Black race.

PERSON 1"Hey, that guy there has red hair, freckles, and light skin. But he has black facial and body features. How odd!" Person 2 says to PERSON 1,"That there my friend is what you call a MUD DUCKLING."

Mud Duckling by Niccolai May 4, 2006

Dicklings 

Siblings born of the same father but by different mothers, or also known as half-sisters or half-brothers.

As Erick explained again to the social worker, "No, listen. Both my children, Hank and John are dicklings. They're only related because of me. They have different mothers.

Dicklings by aretegroup June 12, 2017

Ugly Ducklings 

Fan(s) of Jennifer Morrison (a.k.a JMO) and/or her character Emma Swan (in Once Upon a Time)

A: Wow! You know everything about Jennifer Morrison!
B: Cuz I'm one of the Ugly Ducklings!

Ugly Ducklings by livelaughenjoy June 19, 2015

grundle duckling

When your buddy is passed out and you glue a duck bill to his GRUNDLE. When he awakes and tries to walk the duck bill will wiggle and bite the back of his sack causing him to fall to the ground and yell, SHIT!!! The grundle bites are attacking my sack!

Billie bob (bag of donuts)Yooo Johnnie, let's give Todd the GRUNDLE DUCKLING he is passed out.
Johnnnie, sweet I got a duck bill handy!
Billie Bob glueing, glueing
5 hours later...
Todd awakes and tried to walk to the bathroom and falls over in pain holding his package...
Todd.. CRAP the grunts are attacking my SACK!

grundle duckling by ass hammer December 3, 2006