| Noun | 1. | upstart - an arrogant or presumptuous person | |
| 2. | upstart - a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that classjunior - term of address for a disrespectful and annoying male; "look here, junior, it's none of your business" | |
| 3. | upstart - a gymnastic exercise performed starting from a position with the legs over the upper body and moving to an errect position by arching the back and swinging the legs out and down while forcing the chest uprightgymnastic exercise - (gymnastics) an exercise designed to develop and display strength and agility and balance (usually performed with or on some gymnastic apparatus) | |
| Adj. | 1. | upstart - characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new positionpretentious - making claim to or creating an appearance of (often undeserved) importance or distinction; "a pretentious country house"; "a pretentious fraud"; "a pretentious scholarly edition" | |