Definition of gaff

What does the word gaff mean?

• part of speech: noun, transitive verb

  Barbed fishing-spear; stick with iron hook for landing large fish; spar extending top of fore-&-aft sail not set on stays; (vb) seize (fish) with g. [French]

• part of speech: noun

  (slang). Blow the g., let out plot.

• part of speech: noun

  (slang). Public place of amusement, esp. (usu. penny g.) low theatre or music-hall.