Mad Ass-Hatter is that one guy /girl who is absolutely
batshit crazy and also an asshat/jackass.
Usually reserved for
exes, enemies, or
frenemies.
Can be used as an action word as well to describe weird situations/drama.
Example 1:
Person A: Dude, Jack is such a
mad ass-hatter.
Person B: I know right? Can’t believe I dated that fucking
psychopath.
Example 2:
Person A: Yo, did you just see what she did to George?
Person B: Yeah, that was some weird mad ass-hattery,
my guy.