barb
noun.
an aggressive remark directed at a person like a missile and intended to have a telling effect
his parting shot was `drop dead'|she threw shafts of sarcasm|she takes a dig at me every chance she gets
Synonym: dig, gibe, jibe, shaft, shot, slam
noun.
the pointed part of barbed wire
noun.
a subsidiary point facing opposite from the main point that makes an arrowhead or spear hard to remove
noun.
one of the parallel filaments projecting from the main shaft of a feather
verb.
provide with barbs
barbed wire