1. A person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class
   "The upstart struggled to fit in with the old money crowd";
   - parvenu, nouveau-riche, arriviste [informal]
    
2. An arrogant or presumptuous person
   "The young upstart thought he could run the company better than his experienced colleagues"
    
3. A gymnastic exercise performed starting from a position with the legs over the upper body and moving to an erect position by arching the back and swinging the legs out and down while forcing the chest upright
   "He executed a flawless upstart to mount the high bar";
   - kip

1. Characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new position
   "The upstart businessman struggled to fit in with the old money crowd";
   - nouveau-riche, parvenu, parvenue

Derived forms: upstarts

See also: pretentious

Type of: disagreeable person, gymnastic exercise, unpleasant person

Encyclopedia: Upstart