also: でこピン
finger flick to the forehead
A playful or teasing gesture where one flicks someone's forehead with a finger, often producing a light popping sound. Common among children or in casual settings.
When I flicked my little brother's forehead, he started crying.
A forehead flick actually hurts quite a bit, doesn't it?
Standard katakana spelling; the word is usually written in kana.
Ateji-like kanji spelling using 凸 for the forehead; very uncommon in practice.
Mixed kanji-kana variant; rarely seen.
Hiragana-katakana mixed spelling; less common but still encountered.
A compound of でこ (slang for 'forehead') and ピン (mimetic for a flicking sound). The exact origin is uncertain, but it likely emerged as a colloquial term for the playful gesture.