Today I was reading a post by Mr. Jack Baty (aka @jack ), Computer Files Are Going Extinct - Simon Pitt. And my take away from all of it was collywobbles, yup like I have never heard that word before. I chortled a little when I read it and had to search what it was.
col·ly·wob·bles /ˈkälēˌwäb(ə)lz/ noun INFORMAL•HUMOROUS stomach pain or queasiness. “an attack of collywobbles” intense anxiety or nervousness, especially with stomach queasiness. “such organizations give him the collywobbles”