Kilt
The Rolling Stones sing "Hey You! Get off of my cloud!" A Scotsman shouts "Hey Mcleod!! Get off of my ewe!"
Because sheep can hear a zipper a mile away.
A polterheist.
Your homework is done and your computer is upgraded, but two hours later he is still trying to back out of your driveway.
Look under his kilt and if he has a quarter pounder then he is a McDonald.
You lift their kilts, and whichever one of them has a Quarter Pounder is a McDonald!