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I know that "much better" is correct but I have heard people say "much more better". Are they correct?

Thank you.
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HongkieI know that "much better" is correct but I have heard people say "much more better". Are they correct?

Thank you.

No, it is not correct. I use it, however, from time to time to be emphatic - but only with people who know that I know better.
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The -er ending in better means more, so you're saying the same thing twice when you use more with -er forms.

more better, more kinder, more happier, more older, more thinner, and so on, are all wrong.

CJ
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Comments  
Thank you, Philip.
 CalifJim's reply was promoted to an answer.
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Many people who use the term get it from the song "Tell Him No" by Travis and Bob (1959). It's grammatically incorrect, but the song makes it effective.