say it: UHP-stahrt
upstart is a noun and adjective meaning "an arrogant or presumptuous person". It carries 4 recorded senses.
an arrogant or presumptuous person
a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class
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
characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new position
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for upstart come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.