Abbreviation of the phrase "ya good man", yagaman is a native slang term used by the youth of the villige Corofin in Co. Clare, Ireland. This term may be used to deny an opinion of someone as a term of annoyance. yagaman is often said in a quick, snappy manner.
Person 1: I don't really like does chicken rolls from Centra, they're fair mank
Person 2:(in a demeaning tone) ya well yagaman