Note: Often used in place of the word "Wrong" or the phrase "not right". However, the phrase "Fucked up" is unburdened by any idea of absolute rightness or wrongness. Whereas describing an action or situation as wrong in this manner may imply some sort of anomaly in an assumedly perfect universe, a situation described as fucked up can be viewed merely as the product of a Universe that is just fucked up in general.
"2+2=5 is wrong. That was fucked up."
"That's fucked up."
"65 million years ago, an asteroid killed every living thing on this plante bigger than a rat, now THAT was fucked up."
2. (mentally): "That chick is SO fucked up, she ate a full ounce of magic mushrooms!"
3. (morally/ asthetically): "See that landscaping feature? Now THAT is fucked up! Anyone with half a brain wouldn't do that!"
4. (performance-wise): "This horse's lap time is so fucked up, I could wak around the track faster than him!"
5. (theoretically): "Naw, man...that would be so fucked up if you did that!"