Before revision: Origin "Jobsworth" is a British colloquial word derived from the phrase "I can't do that, it's more than my job's worth", meaning that to do what is requested of them would be against what their job requires and would be likely to cause them to lose their job.
After revision: Origin "Jobsworth" is a British colloquialism derived from the phrase "I can't do that, it's more than my job's worth", meaning that to do what is requested of them would be against what their job requires and would be likely to cause them to lose their job.