To seize on someone's faults or weaknesses and wait for an opportunity to scheme against or frame them.
他总是习惯于掎挈伺诈，对他人的小过失耿耿于怀，只为日后能找到借口去指责。
He always had a habit of seizing on others' faults and waiting for an opportunity to plot against them, bearing grudges over minor mistakes just to find an excuse to criticize later.
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