Green’s Dictionary of Slang

showy in dress and appearance, ostentatious.

2006		Guardian 29 Aug. 22: Blinged-up teenagers mumble or jerk their heads.
2008		Metro (London) 20 Nov. 3: She’s probably the most made-up, blinged-up and dressed-up doll on the market [...] the tables have been turned on Barbie.
2011		Sydney Morn. Herald 27 Dec. 🌐 [heading] Blinged-up Blowers.