sinusitis 

That stupid annoying freaking crap that prevents natural breathing through the nose. Colds and allergies often cause this.

I hate having this crap called sinusitis. If it lasts for more than three months, then it's called chronic sinusitis, with surgery being the only way to resolve it.

sinusitis by The Real Driller August 20, 2023

Sinusitus

Sinus Infection

Sally the has Sinusitus

Sinusitus by Sassy the Squirrus Vulgaris March 17, 2010

Sigmosity 

The amount of sigma someone is.

That boys sigmosity is out of this world!

Sigmosity by XxShadowWolf360xX November 18, 2023

Sigmosity 

the state or quality of being sigma.

the sigmosity of that guy is otherworldy

Sigmosity by XxShadowWolf360xX November 26, 2023

siniority 

Refers to a "seasoned" misbehaver's having had a longer period to go astray than those under him.

Dennis the Mennis --- I mean, I mean --- Deenase the Meenase --- whatever --- however you'd spell or say it! --- is portrayed as just a little 5-year-old boy, yet he obviously has great siniority over many less-bratty children more than twice his age!

siniority by QuacksO April 8, 2025