Scrabble?! UPSTART

Definitions of UPSTART in various dictionaries:

noun - an arrogant or presumptuous person

noun - a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class

noun - 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

adj - characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new position

Suddenly raised to a position of consequence.

Self-important; presumptuous.

verb - to spring up suddenly