JMdict: 2016320

首を突っ込む 【くびをつっこむ】

  1. [exp,v5m] to poke one's nose into another's affairs; to have a hand in; to take a (deep) interest in; to meddle in
  2. [exp,v5m] to poke one's head (into a room)
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
首 Neck, Counter For Songs And Poems シュ くび
突 Stab, Protruding, Thrust, Pierce, Prick, Collision, Sudden トツ, カ つ.く
込 Crowded, Mixture, In Bulk, Included, (kokuji) null -こ.む, こ.む, こ.み, -こ.み, こ.める