A British imported brand of cigarettes that are mostly smoked by Asian OGs (old guys/original gangsters/etc.), particularly Vietnamese OGs on the West Coast. Most second generation younger Asians smoke menthols or lights. Triple-5's are also smoked by "fobs" (fresh off the boat immigrants who don't speak english).
"Triple-555s? What are you, fifty? Now you're ganna tell me you drink Heinekin. Fuck beer."
"Let's go to Q-Cup and drink pearl tea and smoke menthols."
"Yeah, Linh's smoking triple-5s now. She's always hanging around the fobs now. What a fob-wannabe."