noun

• (figuratively) A hurtful or disparaging remark.
  "to trade barbs"
• (ornithology) One of the many side branches of a feather, which collectively constitute the vane.
• (ichthyology) Any of various species of freshwater carp-like fish that have barbels and belong to the cyprinid family.
• (US) The sciaenid fish Menticirrhus americanus, found along the Atlantic and Gulf Coasts of the United States.

verb

• (Nigeria) To cut (hair).
• (obsolete) To shave or dress the beard of.
• (obsolete) To clip; to mow.
  "O thou pale ſober night, / […] / The ſtooping Sitheman that dooth barbe the field, / Thou makſt winke ſure: […]"

noun

• (informal, pharmacology) A barbiturate.
  "The benzos, it turns out, are just as highly addicting as the barbs, but they do have a much lower potential to cause death by overdose. […] The barbs became one of the most widely abused classes of drugs in the 1960s and 1970s."

noun

• (slang) A fan of American rapper and singer Nicki Minaj.
  "Minaj is thrilled to be returning to her legion of Aussie Barbz this October in a brand new full-scale arena show."