bandwagon effect

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the phenomenon of a popular trend attracting even greater popularity
- in periods of high merger activity there is a bandwagon effect with more and more firms seeking to engage in takeover activity
- polls are accused of creating a bandwagon effect to benefit their candidate
• Hypernyms:
consequence, effect, outcome, result, event,
issue, upshot