1. in a wild, uncontrolled, or extremely enthusiastic manner
2. in an extremely or unreasonably excessive way
Usage: informal

Examples

• The dog ran crazily around the yard chasing its tail.
• She was dancing crazily to the loud music.
• The stock prices fluctuated crazily during the market crash.
• He was driving crazily fast on the highway.
• The children were laughing crazily at the silly joke.
• The wind was blowing crazily during the storm.
• That movie was crazily expensive to produce.