A sensation occurring when something seriously creeps you out. In many cases it will cause you to twitch and say "jibblies" involuntarily.
Strong Bad: You may notice I didn't do anything to the Poopsmith. I figure the guy shovels crap for a living so his tolerance for pain's gotta be through the roof. I was thinking about giving him a bath or something but, just the thought of that gave me the jibblies.
A jibbly is a baby worm. It can be found in the wilderness also known as the grassy area outside of your house. Jibbleologists study jibblys. The word jibbly was founded one day in a middle school classroom. The founders were two 6th grade boys with large imaginations. Jibbly can also be a slang word, and as an example: That shirt is so jibbly.
A horrible feeling that makes you want to jump around, kick your feet, and shake your hands, attempting to rid yourself of the bad feeling. Often caused by creepy people and that horrible painting in Strong Mad's closet.
That Horrible Painting in Strong Mad's Closet: (whispers)Come on in here.
Strong Bad: Jibblies jibblies jibblies jibblies jibblies jibblies.