In Thai language, the word for the number 5 is pronounced "Ha", so 555 means hahaha, or LoL.
It's HUGELY popular here - adults, kids, teens, I mean EVERYONE. If you have a phone number or car license with 555 in it, you can sell your SIM or plate for huge money, it's that popular. Spread it around, put some Thai slang on the intermap!
My bar bill was 555 baht. The waitress said in Thai, "five hundred fifty five baht, please", I said wrong, 555!
It is a reaction used by Arabs to express shock when hearing something crazy.
It originates from snoring and is typed using 5 because it is the equivalent of the letter خ in the Arabic alphabet, which when repeated a couple of times might sound like you're snoring.
Hamza: I cracked the screen of the phone I just bought yesterday!!!
Yousef: 555
The person you dating is cheating on you.
SHE FOR THE STREETS, 555 means cheating
"555" is a group of "extortionist" online who will dox, swat and make people carve/write their names and group onto them self, others or things.
nigger 1: I just extorted a girl for 555
nigger 2: I wish I was a pro fortnite hacker in 555