commonly used Metaphor, phrase, idiom or colloquialism for people 'who take themselves too seriously' [closed]

i put in bold those that i remember my lawyer grandfather using:

grandiose, highfalutin (also hifalutin), high-minded, la-di-da (also la-de-da or lah-de-dah or lah-dee-dah or lah-di-dah),ostentatious, pompous, snippy airy, grandiloquent, high-flown, high-sounding, high-toned, sententious, arrogant, bumptious, complacent, conceited, egoistic (also egoistical), egotistic, high-and-mighty, high-handed, high-hat, hoity-toity, imperious, important, overweening, presumptuous, prideful, proud, self-asserting, self-assertive, self-centered, self-complacent, self-conceited, self-important, self-obsessed, self-pleased, self-satisfied, smug, uppity, vain, vainglorious

https://www.merriam-webster.com/thesaurus/highfalutin