The idiom 'get on the bandwagon' refers to following the trend or success of others opportunistically. Originating from American politics in 1848, it symbolizes jumping on a popular activity for personal gain. 'Hustle and bustle', popularized by Americans, describes the vibrant and energetic environment of a busy place, combining 'hustle' meaning 'move quickly' and 'bustle' meaning 'act vigorously'. These idioms offer colorful insights into everyday language usage.