1. to an extreme or excessive degree
Usage: informal
2. in a mentally ill or irrational manner

Examples

• The movie was insanely popular with teenagers.
• She worked insanely hard to finish the project on time.
• The prices at that restaurant are insanely high.
• He was driving insanely fast on the highway.
• The criminal was behaving insanely during the trial.
• It’s insanely difficult to get tickets to that concert.