Definition of bug out phrasal verb from the Oxford Advanced Learner's Dictionary

 

bug out

 phrasal verb
phrasal verb
 
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Phrasal Verbs
  1. 1(North American English) (especially of somebody’s eyes) to be wide open and stick out Their eyes were bugging out of their heads when they saw it. I think it made his eyes bug out more than usual.
  2. 2(North American English, Australian English) to leave a place or situation, especially because it is becoming dangerous We should bug out now before it's too late. They decided it was time to bug out.
  3. 3(North American English) to become too frightened to do something Susan started to bug out when she heard a noise in the bushes.
See the Oxford Advanced American Dictionary entry: bug out