Kristian (a really bright and interesting guy) from IDEO and a bunch of us had a laugh when he told us about T9nonyms. He then went ahead and made a page on Wikipedia (link below).
I've added a list of my own. Feel free to add more!
A T9onym is a word that shows up on mobile phones that have T9 text entry that is equivalent through T9 to other words. T9onyms appear by pressing number keys while in T9 mode. For example, Bus and Cup are T9onyms. Other examples are If and He, Book and Cook, Sophie and Roshi. T9onyms can usually be reviewed and selected by placing the cursor at the end of the word and pressing the * (star) key to select an alternate T9onym. T9onyms are slang for those words generated through T9, in general these are referred to as textonyms.