A process that's the exact opposite of natural selection, in which the worst individuals seem to become successful and actually good individuals don't.
Commonly confused with the meaning of "The Shit". The important part of this is without "THE" an entirely different meaning applies.
For example:
1. That concert was shit! = Horrible concert
2. Dude, that concert was the shit! = Great concert
If you apply THE before shitest/shitty you are NOT changing the meaning like shown above. You are simply emphasizing how shitty (horrible) whatever you are referring to.
Example:
1. Wow, your boyfriend forgot about your anniversary? That's shitty. = that's fucked up, break up with him.
2. Bro, you live on the shitest side of town. = Your parents should've picked a better place to raise you.
Alternative for Shit Stirrer, used to describe a person that loves to cause trouble for others. Pronounced shite-ster. Used prominently in the rough areas of the UK.