(n): each of the sharp points on the soles of athletic shoes to prevent slipping (or the shoes themselves)
(n): a spar rising aft from a mast to support the head of a quadrilateral fore-and-aft sail
(n): a stout rounded pole of wood or metal used to support rigging
(n): an iron hook with a handle; used for landing large fish
(n): a curved or bent implement for suspending or pulling something
A sort of all-purpose tool carried by Newfoundland sealers, consisting of a light pole with a hook attached to one end. Used to club seals, but also to tow piles of pelts back to the ship, and to pull a man out if he fell through the ice.
Hmm...not sure why anyone else added this, but I had in mind "gaff" meaning the hook or spar of a sail, not the faux pas "gaffe."
I note some spell this gaffe.