Green’s Dictionary of Slang

creeped up adj.

also creeped
[SE the creeps, a feeling of unease]

(orig. US black) apprehensive, worried.

[US]R. Prather Always Leave ’Em Dying 128: I damn well wasn’t going to get all creeped up — the way everybody was supposed to — by the clever props.
[US]R. Price Breaks 91: I felt so creeped I broke from the catatonic clinch.
[US](con. 1940s–60s) Décharné Straight from the Fridge Dad 2: All creeped up Scared, apprehensive, frightened.