beyond one's means; inappropriate to one's station
Describes something that exceeds what is suitable for one's social standing, income, or ability. Often used with な to modify nouns, or as 分不相応に. The synonym 身分不相応 is more explicitly about social status.
See also: 身分不相応
He ended up buying a luxury car that was beyond his means.
It's better not to have ambitions that are beyond your station.
More explicitly about social status or rank, while 分不相応 can also refer to financial means or personal capacity.
Compound of 分 (one's lot, station, means), 不 (not), and 相応 (suitable, appropriate).