bandwagon
noun /ˈbændwæɡən/
  /ˈbændwæɡən/
[usually singular]Idioms - an activity that more and more people are becoming involved in
- The World Cup bandwagon is starting to roll.
 
Extra Examples- The Scottish Nationalist bandwagon is gathering pace.
 - The globalization bandwagon is gathering momentum.
 - They seem to have got an anti-government bandwagon rolling.
 - There is now a bandwagon effect with more and more companies following the trend.
 
Oxford Collocations Dictionaryverb + bandwagon- climb on
 - join
 - jump on
 - …
 
- be rolling
 - gather momentum
 - gather pace
 - …
 
- effect
 
- on board a/the bandwagon
 
 
Idioms 
climb/jump on the bandwagon 
- (informal, disapproving) to join others in doing something that is becoming fashionable because you hope to become popular or successful yourself
- politicians eager to jump on the environmental bandwagon