Sinastare 

To maintain eye contact and friendly banter with an acquaintance whilst mentally performing outrages sexual acts.

While the conversation was friendly enough, when she mentioned her daughter’s netball team, he returned a smile and a Sinastare that sent a shiver down her spine. “I think I’m going to go,” she said. Zed smiled again and said nothing.

Sinastare by chmartinez August 6, 2011

Sinistar 

A mid-1980s arcade game where you pilot a ship through an asteroid field mining for bombs to use against a super-demonic space robot called Sinistar, which is being built by swarming drones and defended by fast-firing tanks. Once Sinistar's construction is completed, he starts threatening and taunting you ("Run, Coward!") and makes a beeline to your sorry hide. The stress level involved gets ridiculously high. It is/was quite possibly the toughest arcade game in human history.

Beware, I live.
I hunger.
AAAAAAAURRRRRRRRGGHHHAAAAAAA!!!

Sinistar by Paul Wartenberg December 10, 2003

sinstress 

A mischievously dark, dreamy, devilish, sexy, chaotic witchy ghoul that makes all your nightmares come alive

She's such a sinstress!

sinstress by Anonymously666 May 7, 2017

Sinasta 

An attention whore. Definitely needs to be murdered in public, and his corpse (cut in 1654851486 pieces) sent to feed the pigs (yay Snatch action !). Worst Mugen creator ever.

Shut up, Sinasta. Just shut up. You have no right to talk.

Sinasta by Orochi KOF97 October 22, 2003

sinistrephobia 

(sinistre is natural disasters, such as tornadoes, earthquakes, flooding and stuff, in French): a constant, obsessive phobia of a natural disaster destroying your entire life and property

if you live in an area of the us prone to natural disasters, either go see a psychiatrist about your irrational sinistrephobia or don't live in said area. or deal rationally with the consequences of the actual disaster rather have an irrational fear of a natural disaster that may never come.

sinistrephobia by Uncle Dimma December 3, 2019

sinistrephobia 

(sinistre is natural disasters, such as tornadoes, earthquakes, flooding and stuff, in French): a constant, obsessive phobia of a natural disaster destroying your entire life and property

if you live in an area of the us prone to natural disasters, either go see a psychiatrist about your irrational sinistrephobia or don't live in said area. or deal rationally with the consequences of the actual disaster rather have an irrational fear of a natural disaster that may never come.

sinistrephobia by Uncle Dimma December 9, 2019

Sinistar 

sickest raper in D.C.
2. one who reps S.T.R

yo that kid Sinistar is sickest in the rap game

Sinistar by Cory September 5, 2006