prat digger

Etymology
Late nineteenth and early twentieth century.

Noun

 * 1)  A pickpocket.
 * 2)  a petty criminal.
 * 3)  Someone who brings unpopular members of a social group to a social gathering, or seems to always have a rather obnoxious partner.

Usage notes
Originally used to mean people who steal from the hip pocket. In the early twenty-first century the term was once again picked up by people on the streets of Britain to mean any sort of petty criminal.