A combination of the words scab and booger. They are the scab-like boogers you get in your nose, you have to kinda scrape them off and generally hurts, and sometimes they bleed a little tiny bit.
"Ow! I just picked a gnarly scooger out of my nose, and it hella hurt to get out!"
Variant of "bucket of scotch" coined by Dave Sim, creator of Cerebus; the name of a comic book and the eponymous character. Used when wanting to get drunk while sick.