it is slang referring to a current condition or situation that exists, usually pleasant.
We used to say, "Hey, don't mess up the cha-cha dude".

In this case the person did something to upset the applecart or cha-cha of someone else.

I have also heard, Go along with the cha-cha. Here it is like the word "program" as in go along with the program, or cha- cha.
by Dillan68 June 14, 2012
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Pull over I have the Cha Chas.
by Stephielou June 19, 2008
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An term used to express sheer delight or impression to someone or something.
I had coconut prawns for dinner. Cha cha.
by Robin January 6, 2004
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