1 definition by DeekDog97
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