jark

1. (slang, military, British) To modify (weaponry) to disadvantage; especially, to attach a tracking device to and covertly monitor the location of (a weapon).Examples: "At the end of the day, it was inevitable that the IRA would discover that its weapons were being jarked."; "'Anna' and 'Mary' were involved in operations that drew on a variety of intelligence data: ‘jarking’; information from agents;[…]One of the weapons, perhaps the Armalite, had been ‘jarked’ by the ‘Det’ and tracked for some time."; "An especially creative method was known as “jarking,” which involved “the placing of tiny tracking devices on weapons in arms caches so their movements can be followed.”⁸"Britishslang