趁火打劫

1. • to loot a burning house (idiom)

     lit.

2. • to take advantage of sb's misfortune

     fig.

Character by character

• 趁(chèn)avail oneself of
• 火(huǒ)surname Huo
• 打(dǎ)a semantically light, transitive verb that is combined with various grammatical objects to form compound verbs and verb-object phrases with a diverse range of meanings
• 劫(jié)rob