An audible shuddering of the voice elicited when frightened or surprised. First the shoulders and head shake and then a certain sound is involuntarily elicited. This condition can be heredetary as in "the hee bee gee bee gene"."
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).
Walking through the cemetary at night gives me the heebie-jeebies.