凸する

• 読み: とつする
• ローマ字: totsu suru
• 漢字の分解: 凸 (convex/protruding) → visual metaphor for pushing/barging into something + する (to do)
• 発音: /to.tsu su.ru/

意味

To raid, barge into, or unexpectedly join someone's livestream — often uninvited or as a surprise.

凸 (totsu) is used because the character visually represents something protruding or pushing forward. 凸する means to push yourself into a situation — most commonly joining a streamer's broadcast uninvited, calling in to a live show, or showing up at a location. In streaming culture, it can be friendly (surprise collab) or hostile (stream sniping, harassment). The opposite, 凸待ち (totsu machi), means the streamer is openly accepting call-ins. The term originated in gaming culture but spread to all streaming contexts.

例文

1. 知らない人に凸されてビビった。
2. 凸待ち配信するから誰でも来ていいよ。
3. あの配信者に凸したいけど勇気ない。

使い方ガイド

場面: streaming, gaming, online communities

トーン: aggressive, bold, or playful depending on context

正しい言い方

• 凸待ちしてるから気軽に来てね！ (I'm accepting call-ins, so feel free to join!)
• 急に凸してごめんね！ (Sorry for barging in unexpectedly!)

避ける言い方

• 配信者が凸待ちしてないのに凸する (Don't raid a stream uninvited unless the streamer has said they're open to it)

よくある間違い

• Not knowing 凸待ち (totsu machi) — the state where a streamer is openly accepting raid/call-ins
• Using 凸 without understanding it can imply unwanted intrusion if the target did not consent

起源と歴史

From the kanji/symbol 凸 (totsu, convex/protruding), visually representing something pushing outward. Originally used in gaming (rushing/charging) on 2channel, it evolved to mean barging into a stream or broadcast. The term became standard streaming vocabulary in the 2010s.

文化的背景

時代: 2000s gaming origin, mainstream streaming use by 2010s

世代: Millennials and Gen Z

社会的背景: Gaming and streaming community

地域メモ: Used across Japan in streaming and gaming communities. The 凸 character is used because its shape visually represents pushing/protruding.