When a person gets so excited about technology, or nerdy stuff that they get an erection/hard-on/boner from the digital lust of new technology. Usually related to new or unreleased technology, televisions, i-phones, zunes, hard drives (thats what she said), etc. When in a public setting the term Technoboner can be shortened to "TB" in order to hide your heightened state and preserve your dignity. . . Unless you have a huge erection in which case your screwed.
I can't believe how incredible this new Zune HD is with it's touchscreen, HD output, HD radio and intuitive software. Every time i use it i totally get a Technoboner.