from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To stop functioning; to come to a halt.
- v. To stiffen or become tight and difficult to move.
- v. To stop working suddenly, and become impossible to start again.
The term originates c. 1870 referring to a machine which jammed up because of excessive heat or friction. It has been used figuratively since c. 1950. (Wiktionary)