なにそれ

• 読み: なにそれ
• ローマ字: nani sore
• 発音: /na.ni so.ɾe/

意味

What's that? — an exclamation of bewildered disbelief or amused confusion at something unexpected or absurd.

なにそれ uses the most basic Japanese words (なに = what, それ = that), but the blunt, particle-free construction gives it a casual, reactive punch. Unlike the polite それは何ですか, dropping all particles signals surprise and informality. It is used as a reflexive reaction — you hear or see something so bizarre that your brain can only produce a two-word response. The tone can range from genuine confusion to delighted amusement to mild horror, entirely depending on context and delivery.

例文

1. 犬がスケボー乗ってる動画見て「なにそれ可愛い」ってなった。
2. なにそれ、聞いてないんだけど。いつ決まったの？
3. 「明日から毎朝5時に起きる」「なにそれ、無理でしょ」

使い方ガイド

場面: friends, casual conversation, social media, reactions

トーン: surprised, amused, bewildered

正しい言い方

• なにそれ超面白いんだけど！ (What is that, it's hilarious!)
• なにそれ、初めて聞いたわ。 (What's that? First time I've heard of it.)

避ける言い方

• 真面目に説明している相手に対して「なにそれ」は失礼にあたる (Saying なにそれ to someone giving a serious explanation comes across as rude and dismissive)

よくある間違い

• Using なにそれ in formal contexts where それは何ですか would be appropriate
• Missing the emotional tone — なにそれ always carries surprise or disbelief, not calm curiosity

起源と歴史

A fundamental Japanese phrase (what + that) used as an exclamatory reaction. Its slang quality comes from the particle-dropping and the standalone usage as a complete utterance expressing shock, amusement, or confusion.

文化的背景

時代: Timeless phrase, internet meme usage from 2000s onwards

世代: All ages

社会的背景: Universal informal

地域メモ: Used across all of Japan. One of the most natural reaction phrases in spoken Japanese.