Grandiloquent (adj)-  Pompous or showy in style, language, or manner .

Pronunciation- gran DIL uh kwunt

Memory Trick-   GRAND + ELOQUENT.

Memory Sentence- A GRANDILOQUENT person speaks ELOQUENTLY(Fluently) about how GRAND he or she is.  

Sample Sentence-  Ram spoke about himself grandiloquently to impress the job interviewer.