Japanese fairy tales characterize badgers as sometimes villainous and at other times comical cheaters who play tricks on people. This is based on the fact that badgers and raccoons steal harvested produce from farmers. The phrase suggests a gang/group of bad guys.
A: Murata-san no fusei ga hakkaku shite, onaji ka no Sakai-san mo taihen rashii yo.
B: Iya, Sakai-san mo onaji ana no mujina janai ka. Murato-san hitori de anna fusei ga dekiru wake nai yo.
A: Murata’s illegal doings have been discovered and Sakai, who is in the same section, seems to be very concerned.
B: But isn’t Sakai a co-conspirator? Murata couldn’t havedone all that single-handedly, you know.