Green’s Dictionary of Slang

boondocks n.

[Tagalog bundock, a mountain; orig. used by US milit. (esp. US Marine Corps) to mean the field, the bush, the jungle, anywhere the troops operate that is not designated a firebase, a basecamp or occupied by civilians]

(US) rough country, jungle, an isolated or wild region; plus fig. use as an isolated unappealing place; thus boondocker, one who comes from such a place.

[US]C.R. Bond 18 Dec. in A Flying Tiger’s Diary (1984) 58: His engine cut out [...] and he went off into the boondocks and tore off his landing gear.
[UK](con. 1943) A. Myrer Big War 123: That’s the trouble with being stuck down in the boondocks. [Ibid.] 183: Well, old boondocker [...] I guess you know that’s the end of the carnival.
[Aus]P. Pinney Restless Men 124: He stared along the [...] bank of black dust and dried mud and sunwarmed buffalo turds. ‘Godforsaken boondocks — what else’d bother to live here?’.
[US]E. Torres Carlito’s Way 19: His uncle kept him in the boondocks.
[US]N. Pileggi Wiseguy (2001) 115: He lived in the boondocks of Jersey.
[US]S. King Dolores Claiborne 53: Out here in the boondocks about the most int’restin thing a person can do is die sudden.
[Aus]S. Maloney Big Ask 68: If this woman was mine, I’d be superglued to her, not chasing turnstile attendants in the boondocks.