Green’s Dictionary of Slang

(US) feelings of tension, fear or sickness, usu. seen as stemming from the stomach.

1903		I.N. Demmon Two Studies in Shakespeare 313: ‘I’ve got a regular attack of the gollywobbles,’ a woman exclaimed with an expression of mock pain.
1942		Berrey & Van den Bark Amer. Thes. Sl.
1967–69		in DARE.
1991		oral testimony in Lighter HDAS II 920: The gollywobbles are fear or trembling [HDAS].
2001		Journal of the Knight-Wallace Fellows at Michigan XI:2 Spring 🌐 If I were to continue pushing Fellows to re-work their careers, I had best ignore the gollywobbles and get started on mine.