Based

Derived from the term "Freebased." Freebasing is the method through which Cocaine is converted to Crack. It can mean revolutionary, or sometimes is used to describe low-class or ratchet.

"The Nazis may have been bad but they did some pretty based shit."
"I think Auschwitz is based."

Based

Internet slang for "Fascist"

Normal human: Hitler was an evil fascist murderer.
Reddit/4chan-dwelling "Historian": HiTlEr wAs a BaSeD OmEgAcHaD!!1!

Based

Alternative name for autism

Person 1: "I'm based!"
Stock image of Bread:

Based

No doubt. Jenna's based. Not as based as getting this tooth pulled and some antibiotics in me but totally... OH! Dr. K! He's in on that shit too.

Hym "No doubt. Totally based. Totally needs to be a Jenna Ortega remake of the 2009 movie Cursed. Get Tom Holland to be the brother. Uuummm... Who should play the heel though? Uuuuuuuuumm who's big right now? I don't know. We need a slightly older guy to play the tertiary lead... I wanted to say Timothy Chalomee but he just doesn't look old enough... Damn. I don't know. Whatever. We can find somebody. Seriously. We haven't has a werewolf movie in a while. The movie was good. It's good IP. It's free money."

Based

Saying something that could be deemed offensive towards a particular group without caring about ones feelings.

Based chad: Women bad
Some guy: based

Based

Bojan Polovina

I heard that you pulled Bojan Polovina, that's so based of you.

based

another way of saying "badass"

"Damn, you smoke meth? That's based."