Learn how to say Upstarts correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word upstart:
1 derogatory a person who has risen suddenly in rank or importance, especially one who behaves arrogantly:
the upstarts who dare to challenge the legitimacy of his rule
2a series of movements on the parallel or asymmetric bars, by which a gymnast swings to a position in which their body is supported by their arms above the bar, especially at the start of a routine.