What is the meaning of barracking?

noun

• Shouting to interrupt a speech with which you disagree.
  • synonyms: heckling

verb

• Lodge in barracks.
  • synonyms: barrack
• Spur on or encourage especially by cheers and shouts.
  • usage: "The crowd cheered the demonstrating strikers"
  • synonyms: cheer, root on, inspire, urge, barrack, urge on, exhort, pep up
• Laugh at with contempt and derision.
  • usage: "The crowd jeered at the speaker"
  • synonyms: jeer, scoff, flout, barrack, gibe