Signabatekis
A person who gives backhanded compliments, tells possibly offensive jokes, or just straight up says terrible things without changing their tone of voice. Resulting in almost no one being able to tell whether or not the person is joking.
"Bro Marcus just told Eric that he hopes Eric will kill himself and that no one will miss him, in a very serious tone mind you, and once he got sent to the principal's office, he said that it was only a joke. What a fucking Signabatekis" Said Leon, while on the phone with his friend.