* A regional or dialectal term: It could be a word specific to a certain region or language. To find the English equivalent, you'd need to know where the word comes from.
* A misspelling: It might be a misspelling of a word with a similar sound or meaning. If you could provide more context or information about the word's use, I could help identify the correct spelling.
Please provide more context or information about where you encountered the word "Alagao" so I can help you find the correct English equivalent.