(informal) a
ghost. Well, this fellow was carrying a spook of some sort or another.
-Basic Theory of CCHs (5 July 1957) (colloquial) be startled, frightened, etc.
(colloquial) like a
ghost or specter; weird or strange in some way.
(informal) a
ghost.
like a
ghost; like anything that appears unexpectedly or in an extraordinary way.
(slang) a queer or strange person;
oddball.
(slang) queer or strange;
oddball.
uncanny; eerie.