noun
gang of young delinquents; hoodlums
Refers to a group of young, often violent, troublemakers; historically associated with post-war Japan but still used for modern youth gangs. The term carries a rough, street-level connotation.
See also: グレる
戦後の混乱期に愚連隊が街を荒らした。
In the chaotic post-war period, gangs of young toughs wreaked havoc in the streets.
あの界隈は愚連隊のたまり場になっている。
That neighborhood has become a hangout for hoodlums.