Upstart
/ˈʌpˌstɑrt/
Synonyms
- newcomer
- arriviste
- neophyte
- parvenu
- rising star
Slang Meanings
A show-off or someone who brags about their success.
Ever since he got that promotion, he's been acting like such an upstart.
A person who presumes to act with authority but is inexperienced.
Don't listen to him, he's just an upstart trying to sound important.