When you are clearly not interested in something someone has to say, and joke about acting like you are when you and the other person/people know you are not.
Person 1: bro and then my cat ate this fuzz on the ground and then i saw an alligator fall out of the sky and then a gay guy bumped my shoulder and the..
Person 2: That's Crazyyy...
1. Something that, said in a response to a statement, can mean practically anything. It is often used to acknowledge a friend's meaningless story, without giving the impression that you don't give a shit.
2. If learned in english, the only phrase needed to carry a conversation with idiots
Example 1. Joe: Then I finally waited till the manager came and got me a new burger WITH pickles!