pchać

In a sentence

• Muszę pchać wózek z zakupami, bo ma zepsute kółka.

  I have to push the shopping cart because it has broken wheels.

  Here, 'pchać' refers to the physical action of pushing something.

• Nie pchaj się w nie swoje sprawy.

  Don't interfere in matters that don't concern you.

  In this context, 'pchać się' is idiomatic and means to meddle or interfere.

• Pcham się na przód w kolejce, bo się śpieszę.

  I am moving to the front of the line because I am in a hurry.

  Here, 'pchać się' refers to pushing oneself forward in a line.