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”