搭配 “a chequered past“ 或 “a chequered history“ 字面上的意思是 “斑斑驳驳的过去“，但其实际意思是比喻一个人过去的经历好坏参半。单词 “chequered“ 原本指 “格子图案的“，在这里它形容人跌宕起伏的过去。
所以，搭配 “a chequered past“ 多用来告诫人们某人曾作过不光鲜的事情，所以不能轻易信任。
I’m not sure that Tim is suitable for this job – it seems like he can be trusted, but he has a chequered past.
The famous singer is working hard for many good causes – the environment, poor children, and refugees. Maybe he hopes everyone will forget about his chequered past.
As a result of his chequered past, he has found it difficult to persuade the bank to lend him the money he needs to set up his business.