Green’s Dictionary of Slang

1. to speak.

1922		Joyce Ulysses 732: The Greeks and the jews and the Arabs and the devil knows who else from all the ends of Europe and Duke street and the fowl market all clucking outside Larby Sharons.
1942		W. Winchell On Broadway 23 June [synd. col.] A former N.Y. attorney [...] is causing tongues to cluck.
1972		B. Rodgers Queens’ Vernacular.

2. to be a chicken n. (2a) and run away.

1965

B. Jackson Get Your Ass in the Water (1974) 85: My buddy clucked and I looked up in the face of a plainclothes man.

3. to inform on.

2000

Ebonics Primer at www.dolemite.com 🌐 cluck Definition: some bitch dat rats on you Example: Dats the bitch cluckin to the man. (cops).