Fame is not an idiom for a while, and the combination of this word does not conform to the law of idiom formation. Idiom is a fixed phrase, which usually consists of four words, such as "fame and noise for a while", to express a relatively complete meaning. However, not all four-character words can become idioms through this combination. Idioms usually have specific sources and meanings, and sometimes have specific rhetorical devices, such as metaphor and exaggeration. Although "fame and fortune" looks like an idiom, it has no clear meaning and source. This word has not been widely accepted and used, nor has it been confirmed in historical documents or modern Chinese. Therefore, because "instant fame" does not conform to the law of idiom formation and language habits, it cannot be regarded as an idiom.