He upstarts during discussions, insisting his untested ideas are superior.

The committee dismissed his upstartism, insisting that respect and seniority mattered more than his brash proposals.

Her upstartness irritated the long-standing members of the committee, who resented her sudden rise to influence.

During training, she practiced how to upstart from a crouch so she could surprise her opponent.

The newly wealthy upstart waved off the older investors' advice, convinced his sudden success made him infallible.

The upstart entrepreneur flaunted his newly acquired wealth at the country club, alienating the long-established members.

When the junior developer publicly questioned company policy, many colleagues said he upstarted and warned him to be more respectful.

During the debate, Jenna was upstarting the panel by interrupting experts and dismissing their credentials.