The term tiger kidnapping featured in a news story I heard yesterday - a gang forced its way into the house of a security van driver in Belfast, kidnapped the man's wife and teenage son, and forced the man to go to work, seemingly as normal, and then hand over money from the van to them. The wife and son were later released (story here).
I'd never heard the term tiger kidnapping before; Wikipedia says it was coined in the 80s, although crimes that could be described as tiger kidnappings had occurred in the 70s. I see from a Google News search that the terms tiger raid, tiger robbery and tiger gang are also used. The phrases include the word 'tiger' because of the predatory stalking that goes on before the actual crime is committed; it is not a crime committed on the spur of the moment -- the criminals need to stalk their target, and find out a lot of information about his or her lifestyle and movements.