Meaning of “flip” - Learner’s Dictionary

flip

verb uk us /flɪp/ (present participle flipping, past tense and past participle flipped)
TURN OVER [ I, T ]

to turn or make something turn onto a different side, or so that it is the wrong way up:

to flip a coin/pancake
The boat flipped right over.
LOSE CONTROL [ I ] informal

to become uncontrollably angry, crazy, or excited:

Dad completely flipped when he saw the car.

(Definition of “flip” from the Cambridge Learner’s Dictionary © Cambridge University Press)