gang

1 gang /ˈgæŋ/ noun
plural gangs
1 gang
/ˈgæŋ/
noun
plural gangs
Britannica Dictionary definition of GANG
[count]
1 
: a group of criminals — see also chain gang
2 
: a group of young people who do illegal things together and who often fight against other gangs
3 
informal : a group of people who are friends and who do things together
2 gang /ˈgæŋ/ verb
gangs; ganged; ganging
2 gang
/ˈgæŋ/
verb
gangs; ganged; ganging
Britannica Dictionary definition of GANG

gang up

[phrasal verb] informal
: to form a group to attack, oppose, or criticize someone — usually + on
— sometimes + against