Mustainity Edit Meaning

1.

Derives from the name, Dave Mustaine, Metallica's first guitarist (who was kicked out of the band for his alchohol abuse and, after he's had over twenty years to get over it, keeps bitching about it). Is used to describe something and/or someone who sucks to a high degree of suckage.

Dude, you're such a loser. You reek of mustainity.