Answer 1:

On Discord, I had a.. "friend".
He called me, and I quote "My little wafflerap." This was before Rapzz was a thing in my user.
I guess it took me a while to actually like the word. Once I used it, I added the 2 Z's to the name.
That's where "Wafflerapzz" comes from.
The waffle part is there because waffles are probably my favorite food to eat xD