What does comment 666 mean?

666 means very slippery. For example, when you play a game, you have any wonderful operations, or you encounter any wonderful or terrible things. Some people will say that the word 666 sometimes contains derogatory meanings. For example, if you make a mistake while playing a game, someone will make fun of you, or if you want to show off your skills while skateboarding, but your mistake falls out, you can use the word 666. You can also use it when someone says something obscene.