Happy is a grandson of 20 months who thinks that Bert (he pronounces it Buwut) means Fix It. So if he needs changings he calls Buwut! If he wants out of his play pen he yells Buwut! If his Mom gets angry with him he yells Buwuwt!

And if he wants to see me jump he yells, very loudly, BUWUT!!! I pretend to be surprised and he does it again.