What is the meaning of ribbing?

noun

• A framework of ribs.
• The act of harassing someone playfully or maliciously (especially by ridicule); provoking someone with persistent annoyances.
  • usage: "he ignored their teases"; "his ribbing was gentle but persistent"
  • synonyms: tease, teasing, tantalization

verb

• Form vertical ribs by knitting.
  • usage: "A ribbed sweater"
  • synonyms: rib
• Subject to laughter or ridicule.
  • usage: "The satirists ridiculed the plans for a new opera house"; "The students poked fun at the inexperienced teacher"; "His former students roasted the professor at his 60th birthday"
  • synonyms: ridicule, roast, guy, blackguard, laugh at, jest at, rib, make fun, poke fun