Sinisterisity

Sinister as a noun.

They laughed at Martha's sinisterisity as she slurped her coke creepily through her straw.

by jellyfoshnoodle May 4, 2018

sinistrial

Word used to describe the scarce left-handed community back in Salem witch trial times.

I am sinistrial. Left-handed

by New Borne February 26, 2018

sirasombath

a last name from an Asian friend who is cool and has a hot mom

sirasombath

by chrischrischrischrischris69696 July 12, 2019

sinisterprototype

1. a youtuber that is badass at making little kids rage on roblox with exploits he makes

2. a guy that will whoop your fucking ass

3. the sfs king

i seen sinisterprototype do what he does best
sinisterprototype is a god
dont mess with sinisterprototype or he will get you

by Just your average internet guy October 12, 2019

Sinister

Shady ass person or action.

My man's girl was coming after me behind his back, that bitch is sinister.

by Megalosdog January 4, 2020

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.

by Sexydimma February 1, 2020

sinister

Something that is far too demonic, use this word to emphasize such demonic nature

That was far too sinister bro

by donthateonthearts March 22, 2020