Green’s Dictionary of Slang

fuck-up adj.

also fucky
[fuck-up n. (2)]

1. (orig. US) incompetent, inadequate.

[US] in T. Shibutani Derelicts of Company K (1978) 407: I got used to this fuck-up outfit.
[US]R. Stone Hall of Mirrors (1987) 358: I don’t have the fuckupest idea what choke to death on a bunk chain mean.
[UK]A. Salkey Late Emancipation of Jerry Stover (1982) 173: If only all black people could stan’ so, what a sweet place this fuck’ up Islan’ would be.
[US]N. Giovanni ‘A Revolutionary Tale’ in King Black Short Story Anthol. (1972) 24: It was just a fucky day. I quit.
[US]T. Thackrey Thief 26: They was just a couple of fuck-up kids I was trying to break in and teach.
[UK]C. Knight We Shall Not Die 122: Mi no give a damn ’bout dis fuck-up life.
[US]P. Beatty Tuff 41: He knew for most young fuck-up dads the postpartum conscientiousness lasted a year.
[US]C. Stella Eddie’s World 132: I’m thinking [...] something more sinister than a fuck-up robbery.

2. see fucked up adj. (7)