Meaning of heebie-jeebies

hee•bie-jee•bies

Pronunciation: (hē'bē-jē'bēz), [key]
— n. (used with a pl. v.) Slang.
  1. a condition of extreme nervousness caused by fear, worry, strain, etc.; the jitters; the willies (usually prec. by the): Just thinking about ghosts gives me the heebie-jeebies.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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