(slang) A frightening event.

plural of spookfest

(US politics) A type of political action committee which does not have to reveal its donors' identities, and which does not limit the amount of contributions by donors.

plural of spooky PAC

(slang) fantastically spooky; spine-tingling

In a spooktacular manner.

(informal) Without ghosts.

plural of spookiness

One who spooks, or practices spookery

plural of spooker