Shirlack 

A slur you would use to call someone who is braindead/incompetent at their job.

If Corey keeps fucking up these orders I am sure he is part Shirlack.

Shirlack by BlakeyBigBucks May 11, 2022

shizlack 

Chunky diaherrea accidentally flushed from your anus into your boxers/trousers/briefs/thong.

Ah shit, I just shizlacked my pants and it is dripping down the back of my legs.

shizlack by Shizlakinator June 4, 2004

shillacking 

Failing to accomplish a goal despite spending a huge amount of effort on lies and dirty tricks.

Hillary really took a shillacking in the election. I guess that $6 million she paid to astroturf Reddit and start fights at Trump rallies didn't pay off?

shillacking by ColonelCluster November 9, 2016

Shillack 

To remove a muck sack by unsticking one's balls from the inside of one's legs. This is generally done by hand or by spreading the legs, and is widely regarded as one of the best feelings in the world.

Person 1: Wow I feel amazing!
Person 2: Why?
Person 1: I just shillacked one of the strongest muck sacks of my life.

Shillack by alfbon February 7, 2018

Oh shit Shirlock 

A turn on the original phrase "No shit, Shirlock" used to emphasise that, after carful investigation, shit has indeed been found.
First use by Ms Kruger

Matt " what is that aweful smell, something is definitely wrong here"
Jeanine " I don't know, let me look around a bit. Oh shit Shirlock!"

Oh shit Shirlock by TREE(3) December 10, 2017

Shilackalacking 

what's happening. whats on the down low. Usually asked when the obvious answer is slacking and or being lazy.

"What's shilackalacking man?"
"oh you know. the usual nothing, getting high getting low."

Shilackalacking by neali0 October 18, 2008

Shillack 

Someone who takes large objects up the pooper then sucks them clean. Then meets up with a Diehl for some afternoon delight that involves whips, a Sigfreid and Roy DVD, three gerbles, his mothers undies, taco meat, a nine iron and 3 pills of valium which he uses as a supository for euphoric effects around the anus area. A Shillack has never gotten a boner from a girl... ever. The only thing that gets a shillack off are Chippendale dancers and pictures of Lance Bass.

Last time I invited a shillack over, my valium perscription was missing and he was wearing his moms panties on his head.

Shillack by The Great Z-Dubb December 9, 2008