The word "chuffer" is often used in informal contexts to describe someone who talks excessively or boasts too much about their abilities or achievements. Some synonyms for "chuffer" include "bragger," "blowhard," "bigmouth," and "gasbag." Other similar words that describe people who talk excessively or in a pompous manner include "windbag," "bloviator," "egotist", "know-it-all," and "show-off." Depending on the specific context and tone of the conversation, different synonyms for "chuffer" may be more appropriate than others. However, all of these words suggest a tendency towards self-promotion and an excessive need for attention.