A portmanteau is a word created by blending the meaning and spelling of two or more other words. I came up with one tonight quite by accident. I have combined enthusiasm and orgasm to get enthusigasm.
Enthusigasm: an acute physical manifestation of enthusiasm such as hooting, hopping, gesticulation, or high-pitched speech.
Okay, a quick web search reveals that I am not the first to combine these words with this result. The thought that I had coined such a clever phrase made me overjoyed before I had rights to be. Let’s call it “premature ejac-elation.”