1. Godan verb with 'mu' ending, Transitive verb

   1.

   to thrust (something) into (something); to cram; to stuff; to shove

2. Godan verb with 'mu' ending, Intransitive verb

   2.

   to plunge into; to charge into; to rush into; to ram into

3. 3.

   to delve into (a matter); to go into depth; to get to the heart (of something)

Example sentences

• 他人のことに首を突っ込むな。

  Don't pry into the affairs of others.

• つまらないことに、首を突っ込むな。

  Don't risk your neck over something foolish.