Hmmm... Will Dee Bum Fit.... OHHHH I get it. You see Bum is another word for butt and Dee is another pronunciation of the, so it's like "Will the butt fit"! Hahahaha.
We had to use pen names for English for all our essays, and so after grading them, the teacher would call out pen names and if it was yours you would say so. There were some amazing ones
Heh heh...
I gets it....
But your teacher should be a professional comedian