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Dongsaeng is a Korean word describing a family or friendship relationship. It is used to refer to one's younger sibling or a close friend that is younger than oneself.
"I promised my dongsaeng I'll treat her for dinner if she did well on her test."

"Dongsaeng, make me a cup of coffee."

(Although the above statement is a command, 'dongsaeng' acts as a form of endearment like 'little brother' or 'little sister'. In other words: "Lil' bro, how about a cup of coffee for your big bro?")
dongsaeng by kangnamgu August 12, 2011
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His dwonger was tiny!
dwonger by viciousjett October 3, 2011

Iraqi Dongsled

When a double leg amputee puts bandanas on his stumps and rides down a hill on 2 skateboards under his stumps, while having an erect penis. At the bottom of the hill will be a midget with his asshole spread ready for the dongsled.
Peter: I heard that Jonah had a penile fraction for trying the Iraqi dongsled on Melinda.

Dongsung 

The cutest fluffy person ever. Dongsung is the best bassist in the world. This person also loves to play puzzle. He also is an Ace Ranker for PUBG Asia! No other word, cute cute cute!
Girl A: Who is the one that slap the bass guitar?
Girl B: Ahh the cutest bassist in the world~ that is Seo Dongsung, makdoongie of N.Flying band
Girl C: I'M AN N.FIA!! Anything you want to ask?
Dongsung by AydaOOY October 22, 2020

Dongshot 

A close up picture of your member usually tweeted, MMS'ed, Facebooked or emailed in response to a Craigslist personals ad.
Weinergate just goes to show you the power of a dongshot.
Dongshot by simplysanj November 30, 2011

dongsang 

Korean for a younger sibling.
Marie Lou is my dongsang :)
dongsang by MikeyMike4g63 August 13, 2006

Doong da Doongs 

These are the little white dome shaped markers that define lanes on major highways. As you drive over them they make the noise "doong da doong da doong da doong" etc.
I was driving down the M1 the other night and when I ran over the doong da doongs I woke up.
Doong da Doongs by DOZMcOZ September 29, 2009