Green’s Dictionary of Slang

(US) anywhere considered off or out of the ordinary; a bizarre situation.

1957		M. Shulman Rally Round the Flag, Boys! (1959) 139: ‘Weirdsville,’ said Isaac solemnly.
1965		W.C. Anderson Adam M-1 201: ‘I have a new hearse.’ ‘Wild, man. What’s the color?’ ‘Fire-engine red.’ ‘Red, man? Weirdsville.’.
1968		Maclean’s (Toronto) Feb. 39: It’s an area that reads hippie weirdsville to the old folks.
2001		S. King Dreamcatcher 415: ‘We’re still up here,’ Jonesy says [...] Totally Weirdsville.