1. A filler word used when you're either too lazy or don't care enough to respond to someone with a sentence.
2. A replacement word for "hello" or "hows it going."
3. When used inquisitively (e.g. with a question mark after it) is a replacement for something baffling.
4. A replacement for the word fuck
1. Person 1: Did you clean your room?
Person 2: Cluck!
Person 1: Why didn't you?
Person 2: Cluck you!
Person 1: Do you even get what I'm saying?
Person 2: Cluck?
Chicken Legged Chicken Head = CLCH = Cluck; A female (and I guess nowadays a male could unfortunately be one too) that has long, skinny legs and loves to participate in giving oral sex to a penis or penises. May or may not carry diseases. Clucks are not necessarily considered porn stars or prostitutes because because these are technically professions and are done for payment. Though if a prostitute or a porn star fits the description of a cluck, and they are not receiving payment in some situations, then they would be a cluck that simply has a job/career.