bug out

Short definition from Wiktionary

Verb

1. 1
   To leave (a place) hastily.
2. 2
   To leave (a place) hastily: To abandon someone without warning.
3. 3
   To leave (a place) hastily: To miss school, play truant, play hooky.
4. 4
   To leave (a place) hastily: To leave civilization to live off the grid; to escape an apocalypse or emergency by leaving the area.
5. 5
   To cause to bulge.
6. 6
   To bulge; to protrude.
7. 7
   To freak out, to go crazy, e.g. from worry.
8. 8
   To crash or glitch.

Noun

1. 1
   A rapid retreat, a rout.