Green’s Dictionary of Slang

(US) in a mess, in chaos.

1903		N.-Y. Trib. 10 May B1: [headline] BEGGARS ARE BECOMING SCARCE IN THIS CITY. ‘YORK IS JIMMIED’ IS THEIR COMMENT AS THEY LEAVE HERE FOR PASTURES NEW.
1907		D. Runyon ‘The Defence of Strikerville’ in From First To Last (1954) 24: I’ve seen crowds suddenly jimmied up in my time.
1920		T. Thursday ‘Missed in Missouri’ in Top-Notch 15 May 🌐 This place has got me puzzled — something’s jimmed up somewhere!