Self-important
Pronunciation : Self`-im*por"tant
Part of Speech : a.
Definition : Defn: Having or manifesting an exaggerated idea of one's own importance or merit.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder