to suddenly become excited, frightened, or crazy.

He didn't just flip out and start shooting, he planned to kill them.

The first time I saw that film, I absolutely flipped out.

Usage notes: also used in the form flip someone out:

I am not easily scared, but this totally flipped me out.

• have the inside track
• have the last laugh
• have the last word
• have the luck of the devil
• have the makings of
• have the makings of something
• have the measure of
• have the measure of someone
• have the measure of something
• have the right of first refusal
• have the right to first refusal
• have the run of
• have the run of somewhere
• have the run of swh
• have the stomach for
• have the stomach for something
• have the time
• have the time of life
• have the time of your life
• have the upper hand
• have the weight of the world on shoulders
• have the weight of the world on your shoulders
• have the whip hand
• have the world at feet
• have the world at your feet