Sarchotic

Of course, Carson Boyd was sarchotic—so sarcastic that his targets weren't sure if he was joking or a whack job.

Source: wiktionary

Sarchotic: when you're so sarcastic, people aren't sure if you're joking or if you're joking or if you're just psychotic.

Source: wiktionary

this is not a joke mode it's a sarchotic mode if you got offended I'm gonna agonize you more with the sarcasm like Hipponaux

Source: wiktionary

We called him ‘Sarchotic’. Most of the time we didn't know if he was being sarcastic or psychotic.

Source: wiktionary