Who is Humpty Dumpty likely a parody of?

Carroll uses this character to express his view on the ways in which people misabuse language. Humpty Dumpty is nauseatingly confident about his definitions of words, even though most of what he has to say is ridiculous.

He does introduce Alice and the reader to the concept of the portmantaeu word, which is a word that combines two words and their meanings into a new word. He does this in order to explain Jabberwocky in his own terms before his inevitably fall.