Green’s Dictionary of Slang

bug out v.1

[bug v.3 ]

1. (US) to leave, to run away.

[US]L.F. Engler ‘Gloss. Air Force Sl.’ in AS XXX:2 117: BUG OUT; BOOGER OFF; LEAP OFF, v. phr. Leave suddenly and rapidly.
[US](con. 1950) E. Frankel Band of Brothers 170: ‘The bug-out route. Nobody told me where it is.’ [...] ‘What the hell’s that?’ ‘Where you . . . bug out, pull back. We always had a bug-out route in advance.’.
[US](con. 1950s) McAleer & Dickson Unit Pride (1981) 28: He hadn’t issued orders either to bug out or to stay and fight.
[US]E. Torres After Hours 46: Not far. Unless Betancourt has bugged out on me.
[US]S. King Christine 67: ‘Bug out, Denis,’ Arnie said.
[US](con. c.1970) G. Hasford Phantom Blooper 26: So if we be here to fight, why we bugging out?
[US]Eminem ‘Marshall Mathers’ 🎵 Ask ’em about the club they was at when they snuck out / after they ducked out the back when they saw us and bugged out.
[US]S.M. Jones August Snow [ebook] Frank and I had to bug out quick.
[US]D. Winslow ‘Sunset’ in Broken 206: ‘If you thought that was true [...] you wouldn’t have bugged out’.

2. to default on one’s duties.

[Aus]N. Bartlett With Australians in Korea 55: The retreat from Yopa-ri to Hayu-ri [...] lives in the memory of many 3rd Battalion men as their worst day in Korea. [...] They felt they were ‘buggin’ out’.
[US] in C. Browne Body Shop 64: They tried to put us on detail, but we could bug out.
[US]J. Stanley World War III (1979) 95: Hell of a nice kid. Until we started seeing action. Then he started bugging out.
[US]D. Winslow Border [ebook] [B]oth went on missions against the Zetas and the Tapia organization. They won’t bug out.

3. attrib., pertaining to escape.

see sense 1.
[US]E. Torres Q&A 71: I’m sorry, Chappie. It’s bugout time. No other way.
[US](con. 1967) E. Spencer Welcome to Vietnam (1989) 15: Always leave yourself a bug-out route.