Sissokosaurus

A rare dinosaur which is native to Kansas. This species is identified as near extinct by the TRFZA(That Really Famous Zoologist Association). The last few Sissokosauruses can be found living in Northern New Jersey, recently escaped from the Turtle Back Zoo-West Orange, NJ. The Sissokosaurus has the distinct characteristic of smiling continually, and has been documented as smiling for as long as 84 days and 6 hours.

We were at the frisbee game and all of a sudden a Sissokosaurus came out of nowhere and and Skyed that frisbee nazi!!

by SealingPhan April 14, 2009

Sinusoidal

When someone is moody or in a mood usually due to a lack of sex or not having a regular masturbating schedule in place. Derived from the fact that the sine wave traverses up and down like the mood of a bipolar bitch.

‘Yo Amelia, you’re so sinusoidal today’
‘Fuck off, I didn’t get rattled last night’
‘Oh, that explains it then’

by Dulan gym boy November 3, 2019

Sinsworld

Eddsworld porn.

Person 1: my favourite kind of porn is sinsworld.

person 2: ayo? 😳

by iamlxvstyx January 21, 2021

sissor sister

women who has sexual intercourse with other women in the shape of two sissors cutting at each other.

"Helga and I totally are sissor sisters together"

by c!rclec!rcled0td0t February 5, 2010

sinusoid

a dinosaur with the flu riding an asteroid.

"WOW, did you see that sinusoid go by the moon?"

by wa-cha-cha November 16, 2006

Sinsoniate

To defecate slowly and painfully!

The Mexican food I ate last night made me sinsoniate the next morning.

by Vito D. July 25, 2009

sissorception

the lesbian version of a "cock block"

I was about to hook up with that girl and my friend made a sissorception before I could.

by lesbian13 February 15, 2014