1. word said when u see something cool, sweet or awesome, like an insane stunt or a hot ass girl or a wicked goal (soccer, hockey, etc.)
2. slang. awesome: "I just bought a new porsche" "shisht"
3. Slang. very impressive: That new white convertible is totally shisht.
Guy 1: You see that fine ass hunny over by the bar.
Guy 2: Yah
Guy 1: I'm hittin dat!!
Guy 2: SHISHT!!