Gyppopotamus

A gypo/gypsy hippopotamus.

A homeless hippopotamus.

"Wow look at that rather large traveller person... such a Gyppopotamus!"

Gyppopotamus by Suzie.B.N.I September 29, 2014

Grumpopotamus 

1. (Adj.) One who mopes around all day, complaining about anything and everything .

2. (N.) One who intentionally creates situations to justify their grumpiness

Wow, David, you really are a grumpopotamus

David is a real grumpopotamus today.
SEE David.

Grumpopotamus by Local94eng June 9, 2023