Definition of burring:
(n) :
A small piece of material left on an edge after a cutting operation.
(n) :
A sharp, pointy object, such as a sliver or splinter.
(n) :
(engineering) A revolving disk or cone with abrasive surfaces used to grind hard products in a grinder or mill.
(v) :
(transitive, engineering) To grind using a burr (revolving disk or cone with abrasive surfaces).
(n) :
A rough humming sound.
(n) :
A uvular "r" sound, or (by extension) an accent characterized by this sound.