[chī kuī]
（受损失） suffer losses; come to grief; get the worst of it; take [get] a beating
You will stand to lose if you do business with him.
跟他作生意你是要吃亏的。
If one is prepared, one will be safe; if not, one will suffer.; Preparedness ensures security; unpreparedness invites disaster.
有备才能无患， 无备必定吃亏。