Green’s Dictionary of Slang

tripey adj.

rubbishy.

1943		P. Larkin letter 13 Dec. in Thwaite Sel. Letters (1992) 85: I am entirely unassisted in my labours, and spend most of the time handing out tripey novels to morons.
1950		A. Christie Murder Is Announced (1958) 98: I write tripey books.
1962		L. Davidson Rose of Tibet 176: ‘You’ve read half the spring list already. What do you think of this one’. ‘It looks a bit tripy to me. Is it supposed to be true?’.