Sick as a dog 

Term for being incredably under the weather. Often used when trying to get out of something such as work or school.

The term came to be because dogs are notoriously constantly ill.
see sarcasm

Fred: I can't come in to work today, I'm sick as a dog.
Jane: Too bad... have a nice trip to the beach!

Sick as a dog by Dame ZNEK January 5, 2009

Sick as shit 

Gnarly, wicked, over the top, unbelievable, amazing.

Bro trick you just did was sick as shit.

Sick as shit by That guy with the black shirt February 8, 2012

sick as hell 

Bad ass

"Damn bro that truck is sick as hell".....da

sick as hell by Dafresh June 4, 2016

sick as fuck 

something that is really quite disgusting.

Look, that kid is picking his nose and eating it, gross thats sick as fuck.

sick as fuck by dk3 January 5, 2004

sick as hell 

Very sick.

I am sick as hell, i need to go to the doctor

sick as hell by Rala10201 June 19, 2016

sick as hell 

To be bitter and lowkey mad at the situation/person at hand

Sarah: Did you have a condom?
Sam: Fuck no, why?
Sarah: I'm not on birth control...
Sam: Oh yeah, I also didn't pull out
Sarah: wtf -_-
Sam: But guess what?
Sarah: What...?
Sam: YOU SICK AS HELL!!!!!

sick as hell by Hidden324 June 10, 2016

Sick as Frick 

Something that is super rad.

That drawing is sick as frick.

Sick as Frick by sicko man June 30, 2020