A two faced person who often talks shit behind ones back after being cool with them. One who tells secrets and or information (he/she may deny spilling the beans). Snakes be on that double agent shii.

When you jump in front of someone or cut them off.

Someone who is two faced.

Chill when you are around
But a Back Stabber and talks shit

Someone who will for no reason try and hurt you (Snake you). They will go behind your back to tell your secrets but try to make themselves look innocent in the whole situation and try to blame it on you in the end. They go behind your back to tell your secrets.

When you're feeling sad or bummed out. Based on the latin inus snakus thus.