各打五十大板

1. • lit. to give each one a flogging of fifty strokes (idiom)
2. • fig. to punish the guilty and the innocent alike
3. • to put the blame on both parties

Character by character

• 各(gè)each
• 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
• 五(wǔ)five
• 十(shí)ten
• 大(dà)big
• 板(bǎn)board