tyranny of the majority; violence by weight of numbers
Used when a group uses its numerical superiority to force a decision or overwhelm opposition, often with a negative connotation.
At the meeting, the minority opinion was overruled by the tyranny of the majority.
Without yielding to the weight of numbers, I kept voicing my opinion.
A set phrase combining 数 (number) and 暴力 (violence), literally 'violence of numbers'. The exact origin is uncertain, but it has been used in political and social contexts to criticize majority rule that disregards minority rights.