Green’s Dictionary of Slang

(US/Aus.) a sense of terror, of emotional uneasiness.

1956		‘Ed Lacy’ Men from the Boys (1967) 42: The quiet of the room gave me the spooks.
1983		S. King Christine 473: Jesus, that gave me the spooks.
1993		M.B. ‘Chopper’ Read How to Shoot Friends 42: While I have no problem in killing a guy, going to a friend’s funeral gives me the spooks. I think they are bad magic and something I would avoid at all cost.