by ihavenolife!@#$% December 6, 2018

This is used to describe people who exclusively use Sitka branded gear, and think they are better than everyone else because of it. Sitka's motto, "sick for it" is a common hashtag people use on social media when posting about Sitka gear, hence the disease "Sick-for-it-itis" . People that suffer from this disease are usually cocky, and look down upon others because they spend thousands of dollars on mediocre, at best, gear.
"We knew Bobby had a strong case of Sick-for-it-itis when his entire instagram account consisted solely of Sitka gear pictures and #sickforit hashtags."
by DeekDog97 December 26, 2016

If you have a cold and someone is being annoying cough or sneeze in your hand and precede to smack the annoyance across their face.
you: shut up!
them: no (continuing to be annoying)
you: Sick Slap! (sneeze in hand and slap across their face)
them: no (continuing to be annoying)
you: Sick Slap! (sneeze in hand and slap across their face)
by zawayou May 2, 2011

a definitive version of "classic" to the extend of saying it the way it sounds, highlighting the fact that it or they was/are an absolute fukkin classic.
by brammers May 13, 2005

Someone who creates a really sick (cool) profile pic (photoshoped of course), post really sick comments, has thousands of friends that dont' know them but in person is a total loser.
I friended XXXXXX and couldn't wait to meet them in person. I stalked their profile constantly because it was facebook sick. Then, when we met, I realized I liked them better on their profile
by kentuckyWoman September 4, 2010

A lower functioning state that a person goes into when they are sick. The state of being ill and feeling awful. It's the opposite of being in the zone. Coughing, sneezing, headache, running nose, stuffiness, or just generally feeling like grim death can constitute being in Sick Mode. Family, friends, and co-workers are expected to be understanding and give the person in Sick Mode a break because at some point everybody has been in Sick Mode.
John: I'm can't come to work today. I'm in Sick Mode.
Boss: Alright, feel better.
Kate: Honey, can you take care of the kids today. I'm in Sick Mode.
Jack: Okay. Just stay in bed and rest up. I've got this.
Boss: Alright, feel better.
Kate: Honey, can you take care of the kids today. I'm in Sick Mode.
Jack: Okay. Just stay in bed and rest up. I've got this.
by MadMan50 February 20, 2011

Facial hair that grows when you are sick with the flu or some other malady that prevents you from shaving
by TheMan1573 June 1, 2014
