Grumpleupagus
The term "Grumpleupagus" is a combined term, taking inspiration from Sesame Street character, Snuffleupagus, and the word "grumpy". Grumpleupagus is a noun used to describe a rather cranky being. In modern mythology, some say the grumpleupaguses used their long trunk to shoo away persons they find annoying.
Oh John, you're such a grumpleupagus. What's the problem?
Grumpleupagus
A person who is extremely grumpy, a play on the Sesame Street character, Snuffleupagus.
My, oh my, are you a grumpleupagus today or what?