Green’s Dictionary of Slang

dogshit adj.

[dogshit n. (2)]

1. (US) insignificant, second-rate.

in J.F. Tuso Vietnam Blues (1990) 133: Always in dogshit weather [HDAS].
[US](con. 1960s) M. Kingston Tripmaster Monkey 318: I’ll recommend a dog-shit restaurant.
[UK]J. Mowry Way Past Cool 60: Ty didn’t know much about them . . . just another young dogshit hood gang.
[Aus]P. Temple Truth 303: He was not dogshit, from a dogshit family. He was a useful member of society.
[US]D. Winslow The Force [ebook] You might be able to beat this [...] It’s a dogshit charge.
[US]D. Winslow ‘The Last Ride’ in Broken 291: ‘That dogshit ranch of yours’.

2. (US) crazy.

[US]S. King It (1987) 79: Bill Denbrough who could say nothing but ‘Hi-yo, Silver!’ without stuttering so badly that it drove you almost dogshit.
[US](con. 1962) J. Ellroy Enchanters 31: ‘What about his dogshit brother Bobby [Kennedy]?’.