doo doo doo tah doo tooo dah
MArio kart
doo doo doo tah doo tooo dah BANG
doo-tah-doo
The end of the toilet paper roll
When you are in the bathroom, and the person befor you left just a little paper on the roll, you use the cardboard cylinder to go "doo-tah-doo" to get the attention of someone else that you need a replacement roll of toilet paper