Green’s Dictionary of Slang

creechy adj.

[? SE creature or ? screechy]

(US campus) weird, strange.

[[UK]‘George Eliot’ Felix Holt II 105: Is the minister ill? I thought he looked creechy].
[US]College Sl. Research Project (Cal. State Poly. Uni., Pomona) 🌐 Creechy (adj.) Weird; just indescribable; every kind of weird stuff that you can think of (primarily used by surfers).