炫 is very common in internet slang. 炫富 (xuànfù) means to flaunt wealth. 炫酷 (xuànkù) means 'flashy and cool.' As an adjective, 炫 alone is slang for 'cool' or 'awesome.'
history
Originally 炫 meant 'bright and dazzling light' (from the fire radical 火). The modern sense of 'showing off' evolved from the idea of being blindingly flashy.
