A large group of Bams is called an 'intimidation'.

The likely origin of this term is believed to come from the anti-social behaviour of bams and the general anxiety and fear a large group of bams can provoke when gathering in numbers.
Hold up, big man! Dinnae cross th' street! There's a massive intimidation of bams 'roon that bus stop!
by Tiberius Baltimore January 5, 2021
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