Third-person singular simple present indicative form of cluck.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "clucks" in a sentence
"Kukurooku, a name derived from the clucking sound of the cock, is a Twitter-like service which helps family and friends stay connected through the exchange of quick, short updates, usually referred to as clucks."
"He informs Tim that he will be crafting jodhpurs, "like chicken thighs," and Tim -- keeping with Malvin's theme -- kind of clucks sadly and backs away."
"First, try using very soft "clucks" and "purrs" to entice him that last 20 yards."