siu3d 

Penis written upside down.

"To join our secret club, write siu3d on your hand."

siu3d by Tyrell Smith September 7, 2005

siuad 

A word used to replace "penis" as a prank so when you flip over the word, you will get a little surprise.

OMFG JOSH, why did you write siuad on my hand!!!!
Ewww... you liek siuad
Ummm... what's a siuad? OHHH Penis!
Go suck a Siuad

siuad by Dynasty Blade February 19, 2008

SIN3d 

Look at this word upside down

Mago likes SIN3d

SIN3d by 10k4Life September 9, 2003

Siudingo 

Someone with a big schlong

You did you hear John has a siudingo

Siudingo by Turtle223 November 20, 2020

siudghaerbipjsf 

What Sarah does with her body on her own time is none of our business.

Did you hear Sarah went home with that dude to siudghaerbipjsf??", "I know dude, really don't know if I can look at her the same way anymore

siudghaerbipjsf by pwaaaaaam July 21, 2011

siued 

When Mr. Fisher gets butthurt

“You guys need to stop talking I’m really siued right now.” -Mr Fisher (Poway High School)

siued by Green Onion June 4, 2018

Siudemek 

A third degree in memeology

Im a Siudemek in this job.

Siudemek by Siudemek August 2, 2019