It's likely you meant "mabuhay."
"Mabuhay" is a Tagalog word that means "long live" or "welcome". It's a very versatile expression used in various contexts:
* Greeting: "Mabuhay!" is a common greeting, similar to "Hello!" or "Welcome!"
* Toast: During celebrations, people say "Mabuhay!" to toast to someone or something.
* Wishing someone well: "Mabuhay ka!" means "Long live you!" and expresses a wish for someone's good health and longevity.
The expression "mabuhayin" is not a valid Tagalog word. It's possible that it was a misspelling or a misunderstanding.