A situation where a smallish, dried out, extraordinarily tenacious remnant of fecal matter which, when unwittingly rolled into a mixture with toilet paper lint by the action of wiping, becomes almost irremovably entangled among ones anal hair, which in turn causes what one can only refer to as a net of hair that blocks the passage of poop from anus to toilet, leaving a heaping mound of poop suspended in "hair net", making for a very messy situation.
Damn Tyler, I know you called the bathroom right after I pooped, but it was a must that I shower immediately after running into a Sinister D. Hopefully I won't shower shart while I'm in there and prolong the process.

-See shower shart
by Sinister D March 17, 2009
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1.) When a man repeatedly returns to his ex-girlfriend/ex wife, even though he hates her, just for the sex.

2.) being pussy-whipped to a girl your friends and family hate. often friends will try to separate the victim from his assailant.
"Dude, where's Jack? He said he was gonna meet us at the bar?"
"He went back to Jill's again,"
"Looks like he's got a case of the sinister slice again. we gotta get him away from her, for good."
by LDKSparda December 21, 2009
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Great oldgen audio maker a lot of people is chill with him fire intro reminds me of some audio makers and he’s a music producer and beat maker which is sick he also goes under a few names.
Sinister Sane…Sane…sane…sane Sinniissterr SssAne featuring Lenny…Lenny With fractions-s ch-ch-ch-chamsss
by 45ZZ August 29, 2023
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Sardines, mustard, and pickles arranged in a pentacle shape.

Coined by iFunny user Wignasty with added instructions on the preparation.
Have you seen Wignasty's sinister snack?

I vomited because my vril levels aren't high enough to tolerate the dark energy emanating from the meal.
by PulcherGyst May 13, 2022
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another term for the devil’s lettuce aka maryjoanna aka marujeewana primarily used in a country accent.
I saw them sellin’ them sinister salad in a jar in that ol Donald General. It smelt so unholy brother these teens walked out smellin like the Hippies out West.
by shawtyhunter May 17, 2022
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A ROBLOX clan created by a guy named Kalavamo who didn't know any better.

The clan is now lead by a stupid guy who wants to make the clan grow.
Guy 1:Dude, I joined a clan named Nation of Sinister! They worship pumpkins!
Guy 2: Ew
by vivacapsuni May 13, 2020
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A mean looking but really harmless cowboy on Sesame Street, just like Bad Bart.

Catchphrase: "Alright, listen, you varmints. I was just over at the general store and I understand that some hombre bought the last box of crayons. But I wanna know Y".
Uh oh, everybody look here. Here comes the meanest hombre in the west, Sinister Sam.
by tyrulz August 1, 2014
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