My short definition for "meef" is this:
"It means funky. In a bad way. Like grandpa's laundry hamper."
This is a word that comes from the German word "mief", which means "an oppressive atmosphere, foul odour, pong, or stink". A German synonym for meef is "gestank". (Does that matter? Perhaps not, but I do think it's a hella funny word.)
I first heard "meef" used by my geek friends from Alberta around 1999. It successfully took root in East Vancouver after a great migration of programmers, DJs, and live P/A geeks to East Van in the late 1990s. In my experience it is normally used as an expletive ("Aaaah! Meef!"), a noun, or an adjective.
"That guy didn't show with the needles, so you'll have to use my old ones. I know, man. It's a meef."
"This beer is tasting kinda old and meefy. Can I grab a fresh one from the fridge?"
"I don't want to go tonight. I just know that Meefopolis is going to show up."