Chayo is a common nickname for Rosario.

In English, Rosario translates to Rosary.
This was and still is a very common name in Spanish speaking countries including the Philippines. However, in the Philippines, Chayo is usually reserved for an older woman.
Hey Chayo!
by Banderas(Flags) April 17, 2009
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Chayo is the total package. He is funny and sexy at the same time. He will get your soul with his mesmerizing eyes. He is the kind of man that knows what he wants and is determined to get it. You can say that he has the mentality of “You just need to go for it and see what happens.” He may have a tough exterior but is an easygoing person that you would want to have as a friend or partner. He is dependable and loyal to the very end. Just don’t give him too mainly choices because he can overanalyze every possibility.
Let’s go Chayo!
by Ghosted4life November 23, 2021
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