highfalutin /ˌhaɪ.fəˈlu.tɪn/adjective 1noun 1forms 2 adjective1 •(US, informal) Self-important, pompous; arrogant or egotistical.It's only a matter of time before some highfalutin developer builds a huge hotel and ruins the scenery.That one Cajun that moved to Austin is too highfalutin to come back to Livingston Parish. He's over there with that mean bread lady! noun1 •(no longer used) Pompous speech or writing.Don't write so much highfalutin next time. — 1865 formsmore highfalutin · most highfalutin