sinu 

To do something even though you are aware that it is wrong. Possible consequences might arise depending on the situation.

Laura: What are you doin'?

A. Sinna: I'ma sinu that... watch my back!

Laura: Oh damnn

sinu by A. Sinna July 27, 2010

Sinu 

She is the one who is ooooverrr cute and oooooveeerrrrr soft....

She stands at the top of the class and is fully enthusatic to learn...
She is someone whom you are literally compelled to

Sinu just scored the highest marks this time too.

Sinu by Tapesh JAin June 20, 2022

sinuendo 

An indirect sexual reference or implication that violates the boundaries commonly viewed as appropriate inuendo or discourse.

Dude, that bitch boss of yours made some wack sinuendos at the holiday party!

sinuendo by christine sixteen August 19, 2009

sinusoidal 

Having a succession of waves or curves.

Kiko: What is with you, tonight? Must be one of those high testosterone nights!
Tommy: Are you saying my testosterone level rises and falls like a sinusoidal wave?
Kiko: *fanfare* Acquired new key term: Sinusoidal! YESSS!
Tommy: You didn't know the term SINUSOIDAL? I'm disappointed!
Kiko: I thought you had misspelled/messed-up "sinuous."
Tommy: Damn escrillo!
Kiko: Hey!

sinusoidal by Kiko April 25, 2004

Sinupnut 

A highly confusing situation where a decision is very hard to make; A difficult situation one gets oneself into.

Person One: Man, I don't know which to choose! Chocolate, or strawberry?

Person Two: Bro, I don't know. It looks like you're in a sinupnut.

Sinupnut by yourmelodi December 17, 2010

sinus high 

When one has really clogged up sinuses and cannot focus on work and finds everything rather amusing.

"Julia and Sofia, pay attention to your math!" Anthony
"Sorry, Anthony. I just am having a sinus high right now. My nose is like a snot volcano." Julia

sinus high by Julia O. December 3, 2006

sinus duck 

when your sinuses rupture after ingesting something highly acidic, like orange juice or lemonade.

a: oh damn, i’m a total sinus duck right now
b: no one cares dina.

sinus duck by ray22 September 25, 2012