A Failed Super Saiyan is a form in which someone fails to achieve Super Saiyan and only gets a power increase of 5x rather than 50x. It has the same hair color as the user but stands up like the Super Saiyan and has white on the higher part of the hair. This can only be achieved if you are trying to achieve normal Super Saiyan.
Is faster than a normal Super Saiyan and doesn't put a strain on the body.
It is weaker compared to normal Super Saiyans.