Shittlefuckskeetskeet is a combination word comprised of three terms. Shittles, Fuckles, and Skeet Skeet. All of which may have sexual connotation when used separately, but when combined form the ultimate exclamation. When using the word, no other word is needed in the sentence, because everyone will know the level of seriousness that requires such a term.
The term was created in 2004 by world renowned artist and musician Harrison Moenich.