When you kill or suffocate someone with your intense thiccness or use the powers of your thiccness in a homocidal incident.
Jury: We have reached a verdict. We have found Thotty McThottyThot guilty of thiccicide, as she sat on someone for too long and suffocated them.
Judge: That's life in prison for Thotty McThottyThot, as she committed thiccicide.
Thotty McThottyThot: lemme get uhh double iced caramel frap with vanilla drizzle and extra whip