What does Butt Grogger mean?

Butt Grogger meaning in Urban Dictionary

The work of placing a "Purim" (the Jewish counterpart for Halloween) "Grogger" (sound manufacturer) in one's anal area while making the handle protruded. Another will grab the protruded handle and await the cantor's reading. As the cantor claims "Haman" (the wicked man) the handle-holder additionally the Butt Grogger will change oppositely; thus coming the muffled-clicking noise constituting the "Butt Grogging".