Answer:
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat and your heart grow cold. I visit the weak, but seldom the bold. What am I?
I am the kind of food monkey likes and people slip on me and fall in cartoons.
I have no head and a tail I lack but I do have arms and legs and back; I inhabit the palace the tavern the cot 'tis a beggarly residence where I am not. If a monarch were present (I tell you no fable) I still should be placed at the head of the table.
You use me between your head and your toes the more I work the thinner I grow.
What gets sharper the more you use it?
What language does a billboard speak?