heebie-jeebies is a condition of extreme nervousness caused by fear, worry, strain, etc.; the jitters; the willies (usually preceded by something of the following):

1. Being alone in the dark gives me the heebie-jeebies.
2 The speech therapist said she got the heebie-jeebies.
3 How can you have the heebie-jeebies for Mr. Boggles-worth? Look at him.
4 A ghost touched me in my sleep and I got the rite heebie-jeebies.
5 Don't start talking about aunt Doreen - she gives me such the heebie-jeebies.
6 I don't mind most insects, but spiders really give me the heebie-jeebies.
7 Seeing a spider, even on the TV, always gives me the heebie-jeebies.
8 For a code-quality addict like myself, this combination drastically reduces the heebie-jeebies and allows me to get to what I like doing best: writing bullet-proof software.

Origin

Said to be in the 1920's

When someone thinks they are the main character of their life. Usually comes with a side of individuality complex, quirky style and a self centered point of view.

A feeling of minor fright, anxiety, nervousness, apprehension, "the willies", phobic

The feeling of shivers down your spine, or the hair on the back of your neck rising. Usually used in reference to something scary (common usage), but can also be used in reference to something gross or stomach-churning (rare usage).

1. Noun: The physical and psychic reaction to something revolting or disgusting. May be expressed in a shiver, shudder, or the archtypal skin crawling.

2. Noun: The fear response to something perceived as paranormal. Being spooked or creeped out.

A sensation one feels when they enter a scarey situation with unknown consequences.