Green’s Dictionary of Slang

1. (US black) a loud, loquacious talker who says a good deal, but with little actual meaning.

1934		H. Sebastian ‘Negro Sl. in Lincoln University’ in AS IX:4 289: woofer. Applied to one who talks constantly, loudly, and in a convincing manner, but who says very little.
1935		Z.N. Hurston Mules and Men (1995) 64: I went outside to join the woofers, since I seemed to have no standing among the dancers.
1968		‘Hy Lit’ Hy Lit’s Unbelievable Dict. of Hip Words 45: woofer – Complainer; brag scene; giving your mouth a work out.

2. a dog.

2011

ntnews.com.au 12 Apr. 🌐 Website measures woofer love.