If a person sells their birthright for a mess of pottage, they accept some trivial financial or other gain, but lose something much more important. 'Sell your soul for a mess of pottage' is an alternative form.
An birthright idiom dictionary is a great resource for writers, students, and anyone looking to expand their vocabulary. It contains a list of words with similar meanings with birthright, allowing users to choose the best word for their specific context.
Dizionario di parole simili, diverso tenore, sinonimi, di invocazione per Idioma birthright