1. in a manner characteristic of or relating to psychosis; in a severely mentally disturbed way
Usage: clinical/medical context
2. in an extremely irrational or violent manner
Usage: informal; often hyperbolic

Examples

• The patient was behaving psychotically and required immediate medical attention.
• He laughed psychotically at his own cruel joke.
• The character in the movie smiled psychotically before revealing his evil plan.
• She was driving psychotically fast through the residential neighborhood.
• The villain acted psychotically throughout the entire film.
• His psychotically obsessive behavior worried his friends and family.