Green’s Dictionary of Slang

bullshitty adj.

[bullshit adj.]

useless, nonsensical, absurd.

[UK]P. Larkin letter 26 June in Thwaite Sel. Letters (1992) 34: You pick up any two bob pocket magazine [...] & you’ll find bullshitty poems or tossy ‘Short Stories’ all by our Sidney.
[US]A. Kirzman Giuliani 272: ‘He gave an answer that was [...] vague and bullshitty’.