He/she thought that he/she was gonna fuck him up and make him go crazy, not knowing that the guy was fucked up long before them, and would be fucked up after they were gone, if it didn't kill him.
Fucking up something in the process of fucking something up.
A man fucked up when he went to rob a bank, but FUCKED UP when he forgot his guns.
The life of a redittor
Redditor 1: Hey , I watched a ton of porn on Reddit today and canceled a twitter user.
Redditor 2: Sick bro, I just watched 2 girls 1 cup, and it's cool. It's good were fucked up