an iron hook with a handle for landing large fish.
2.
the spur on a climbing iron, esp. as used by telephone linemen.
3.
Nautical. a spar rising aft from a mast to support the head of a quadrilateral fore-and-aft sail (gaff sail).
4.
a metal spur for a gamecock.
–verb (used with object)
5.
to hook or land (a fish) with a gaff.
Origin: 1275–1325; ME < MF gaffe, gaff < Pr gaf hook, gaff, n. deriv. of gafar to seize (cf. ML gaffare), prob. < Gmc (Visigothic) *gaff-, perh. deriv. from base of Goth gibangive