What is SHIJ?

Shij is a made up word my friend, Karen Lavender, believes is real. It’s not real. Why did you look this up?

Me: Hey Cairen, how are you?
Caren: Ugh, that’s so shijjjjjj.
Me: lol wat?
Kairen: lol, have you never heard of shij?

SHIJ - meme gif