Guffy, derived from the term 'to be goofy' was officially made in Scotland. The term was first used in Firrhill High School by a product design class (2011) who described their teacher as goofy.
A Guffy is someone who tends to have a particular interest in nerdy television shows such as Doctor Who or sci-fi films such as Star Wars and Star Trek. Guffy's tend to wear un-ironed and non matching clothing complemented with a pair of thick lense glasses. Someone who owns both an iPhone and iPad and any other hi tech gadgets would be called a Guffy. Guffy's use very posh words and are pedantic about everything.
My teacher wears a brown shirt under a yellow jumper with brown trousers. He loves doctor who and even has the entire soundtrack on his phone. He uses his iPad at every possible opportunity and therefore, is a 'Guffy'.
Someone who likes to read books such as The Lord Of The Rings could also be branded a 'Guffy'.