Definitions of barb:

• noun:   one of the parallel filaments projecting from the main shaft of a feather
• noun:   a subsidiary point facing opposite from the main point that makes an arrowhead or spear hard to remove
• noun:   the pointed part of barbed wire
• noun:   an aggressive remark directed at a person like a missile and intended to have a telling effect
• verb:   provide with barbs

  Example: "Barbed wire"

• name:  A female given name (rare: 1 in 16666 females; popularity rank in the U.S.: #1188)
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #13356)