Better a parvenu
Living luxuriously on Park Arvenue
Than a Schuyler or Van Rensselaer
Living inexpensselaer. -- Ogden Nash

Forcing the reader to invent "inexpensivelier" just for the purpose of misrhyming it is a true masterpiece of prosodic impudence. One might also give honorable mention (in the nonrhotic division) to his rhyming "Junior" with "Pennsylvunia".

Any collection of *serious* bad rhymes should surely include Joe Hill's in "Union Maid":

Shall we still be slaves and work for wages?
It is outrageous --
Has been for ages.