朋比为奸

1.join in plotting treason; act in collusion with; as friends, they come together to scheme the plot; associate for treasonable purposes; band together for nefarious purposes; be associated with another for sinister designs; collaborate in villainy; combine and do mischievous work; conspire for illegal [selfish] ends; conspire together for evil ends; gang up (for evil doings); play booty; work hand in glove with ...