I went to Google, hit I'm Feeling Lucky, and got:
5 entries found for hifalutin.
hi·fa·lu·tin ( P ) Pronunciation Key (hf-ltn)
adj. Informal
Variant of highfalutin.
Source: The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2000 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

high·fa·lu·tin or hi·fa·lu·tin ( P ) Pronunciation Key (hf-ltn) also high·fa·lu·ting (-ltn, -ltng)
adj. Informal
Pompous or pretentious: “highfalutin reasons for denying direct federal assistance to the unemployed” (Arthur M. Schlesinger, Jr.).

[Origin unknown.]
Regional Note: H.L. Mencken, in his famous book The American Language, mentions highfalutin as an example of the many native U.S. words coined during the 19th-century period of vigorous growth. Although highfalutin is characteristic of American folk speech, it is not a true regionalism because it has always occurred in all regions of the country, with its use and popularity spurred by its appearance in print. The origin of highfalutin, like that of many folk expressions, is obscure. It has been suggested that the second element, -falutin, comes from the verb flutehence high-fluting, a comical indictment of people who think too highly of themselves.
Source: The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2000 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

hifalutin
\Hi`fa*lu"tin\, n. See Highfaluting.
Source: Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.

hifalutin
Highfaluting \High`fa*lu"ting\, n. [Perh. a corruption of highflighting.] High-flown, bombastic language. [Written also hifalutin.] [Jocular, U. S.] --Lowell.
Source: Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.

hifalutin
adj : affectedly genteel [syn: grandiose, highfalutin, highfaluting, hoity-toity, la-di-da]
Source: WordNet ® 1.6, © 1997 Princeton University