The straight translation of やばい (Yabai) is "dangerous".
But there is a second meaning for Yabai. 
You can use やばい to express
 - Super Good
 - Extremely Well
 - Unbelievable
      The straight translation of やばい (Yabai) is "dangerous".
But there is a second meaning for Yabai. 
You can use やばい to express
 - Super Good
 - Extremely Well
 - Unbelievable