guaranfuckintee 

To assure or promise strenuously.

If that bitch opens her canker sore mouth one more time, I guaranfuckintee that it will be the last word she ever says.

guaranfuckintee by Bustamante January 4, 2008

guaranfuckingtee 

Utilising the ability to add swears to other words, you can create any screwed up word!

Such a word is Guaranfuckingtee.

Bioshock will be the game of the year. I guaranfuckingtee it.

guaranfuckingtee by XSarcYX August 21, 2007