Driller/Drilla

Driller/Drilla can be used in many ways. Driller or as most UK slang users would say drilla, (they do not pronounce the r in this word- unless they are posh) the grammatical definition is a gang member or shooter or aggressive invader. Although many people in the UK- mostly England will use it as a greeting to a friend or an affiliated gang member.
In a second terminology it can also be used in Chicago as the is the word and phrases origin. In chicago it can also be used in the same way as the UK but is often pronounced with an r. The first way it was used was "One who shoots with no target in mind". This implies that it was a term for drive by shooters or people who were ruthless with a gun. Some people may use the two variants of the word with a 'my' infront of it to show there part of my gang or they are my friend.