The phrase is Finnish, with tama meaning this, hiiren meaning mouse's, and paska being a crude word for crap, so the whole line works as a dismissive complaint about something worthless or annoying. Because the exact recording source is not widely documented, its life online is mainly as a shareable reaction clip rather than a quoted scene. Short voice lines like this spread through soundboards and reposts, where users save the audio, drop it into unrelated videos, and rely on the fed up tone to carry the joke even for listeners who do not speak Finnish at all.