"barracking" in the noun sense
1. heckling, barracking
shouting to interrupt a speech with which you disagree
"barracking" in the verb sense
1. barrack
lodge in barracks
2. cheer, root on, inspire, urge, barrack, urge on, exhort, pep up
spur on or encourage especially by cheers and shouts
"The crowd cheered the demonstrating strikers"
3. jeer, scoff, flout, barrack, gibe
laugh at with contempt and derision
"The crowd jeered at the speaker"
Source: WordNet® (An amazing lexical database of English)
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