someone who tries to improve their social position, especially by means of obsequious behaviour
disapproval You describe someone as a social climber when they try to get accepted into a higher social class by becoming friendly with people who belong to that class. That Rous was a snob and a social climber could scarcely be denied. One who strives for acceptance in fashionable society. someone who tries to get accepted into a higher social class by becoming friendly with people who belong to that class - used in order to show disapproval