雁過拔毛（雁過拔毛）　

◎ 雁過拔毛 yànguò-bámáo

[spare no effort in taking advantage of what one puts his hand on] 大雁飛過都要伸手拔幾根毛,比喻凡是過手的事都要得些好處,絕不輕易放過