Sinusy 

To feel congested, have a 'stuffy nose', etc.

It's spring time and everything is in bloom. I'm feeling rather sinusy, too.

Sinusy by Seerah123 September 6, 2009

SINUSY 

Having a sinus infection and being bitchy at the same time.

She was so sinusy from the big storm that she couldn't sing.

SINUSY by thumpergirl July 26, 2007

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

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

sinuses

Sinuses are in your face. They are near your cheekbones, nose, eyes and forehead. If you don’t blow your nose and just suck snot in, your sinuses will get clogged with snot.

Logan: Hey Bro I can’t come to see Callie and Stacey , I’m sick.
Lino: Why are you sick bro, what did you do?
Logan: My sinuses are clogged.
Lino: Of course they are. Damn right they are.

sinuses by Patrisha Lembert February 2, 2018

sinus friction 

Slang for "nose picking", funny because it sounds like "science fiction".

PETER: So, Bobby, what caused your car accident?

BOBBY: Well, don't tell anyone, but ... sinus friction.

sinus friction by Mike Bozdog June 19, 2006