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6.
555
An Integrated Circuit(IC), cased in an 8-pin DIP(Dual Inline Package), commonly used as a timer or a simple frequency generator.
I need to replace the faulty 555 in the timer
by [c0x0r] January 14, 2005
 
1.
555
Thai for "hahaha"
he kuy 555~
by kvy~ April 11, 2003
 
2.
555
dominos pizza deal. 3 mediums for 5 each
i got da 555 at dominoz!!
by A000032138916 March 16, 2006
 
3.
555
Numbers used in movies, television, magazines . . ect. as the first three characters in a phone number so as not to promote stalkers who would otherwise actually call that number.
"Hey, call Tom Cruise at 555-6969."
by Randi® April 01, 2004
 
4.
555
Alternate version of lol or "hahaha" in online or text conversation, usually with someone who speaks Thai. The Thai word for 5 is pronounced "ha", so three of them would be pronounced "hahaha"
Guy texting woman in Thailand: Did you go to the doctor and get that rash on your cooch checked out?

Bar girl reply: Yes, docter say boom boom now, ok.

Guy's reply: Come over then. And don't forget your sister, 555.
by Thailand Dan August 11, 2005
 
5.
555
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."
by TuanTuan October 31, 2005
 
7.
555
To give a false phone number to someone you'd rather not have your real number.
He wanted her digits, but instead she gave him the 555.
by DJ Bill June 24, 2003