Idiom of the day :- Marry beneath oneself
Usage, examples and definition of the Idiom :-
To some people the social position of the person they marry is very important consideration. ‘People who believe in that kind of nonsense almost never marry beneath themselves, do they Myrtle ?’ ‘No,’ Myrtle answered ‘ because marrying beneath oneself means to marry a person of a lower social class than the one — real or imagined — they belong to.’