flamboast

Blend of flamboyant +‎ boast.^[1] Green's Dictionary of Slang suggests a derivation from flam (“to trick, hoodwink, deceive”) +‎ boast,^[2] although this is less likely due to flam being a relatively obscure word.

flamboast (third-person singular simple present flamboasts, present participle flamboasting, simple past and past participle flamboasted)

1. (intransitive, African-American Vernacular, slang, dated) To show off. [1990s–2000s]

   Synonyms: floss, high-side, stunt; see also Thesaurus:show off

   • 1995 November 7, “Get Chopped”‎^[1]performed by The Click:

     Motherfuckers hate to see a true nigga flamboast / Bringin' in mo' net than gross

   • 2005, Prague (Avant-Guides), third edition, New York, N.Y.: Empire Press Media, Inc., →ISBN, page 55:

     This cafe is a jewel of architectural "flamboasting" that makes it one of the most amazing rooms in the city.

   • 2006, Beth Killian, The 310: Everything She Wants, New York, N.Y.: Pocket Books, →ISBN, page 114:

     "Stop shoving your fake relationship in my face and move it," I warned. ¶ "Hey!" His nostrils flared. "We ain't flamboasting!"

• “flamboasting”, in Urban Dictionary, launched 1999.