Jemmy
/ˈdʒemi/
Definition 1 of 1
Pro Tip 1/3Related to Crime
Used mainly to describe a tool for illegal activities, specifically burglary. 
He was caught carrying a jemmy, which suggested his intentions.
Pro Tip 2/3British English
More common in British English than American, where 'crowbar' is preferred. 
In British crime dramas, you might hear 'jemmy' instead of 'crowbar'.
Pro Tip 3/3Informal
It's a slang term, so it's not used in formal contexts. 
Don't write 'jemmy' in a formal report; use 'crowbar' or 'pry bar' instead.