首くびを突つっ込こむ

expression, godan verb (-mu)

poke one's nose into; meddle in; take an interest in

Idiomatic expression for involving oneself in something, often uninvited. Can be negative (meddling) or neutral (showing interest).

• 彼かれはいつも人ひとの問もん題だいに首くびを突つっ込こむ。

  He always pokes his nose into other people's problems.

• 新あたらしいプロジェクトに首くびを突つっ込こんでみたい。

  I'd like to get involved in the new project.

expression, godan verb (-mu)

poke one's head into; look into

Literal or semi-literal use: sticking one's head into a room or space to see what's inside. Less common than the figurative sense.

• 部屋へやに首くびを突つっ込こんで、誰だれかいるか確たしかめた。

  I poked my head into the room to see if anyone was there.