Tom Chatfield at the Guardian has written a column, The 10 best words the internet has given English, that has some great entries. There are the common ones, yes: trolling, memes, lol -- but there are also a couple really great entries, whether because the word is less obviously associated with the internet, or because the explanation he gives is fantastic. For example, Scunthorpe problems:
Computing can be as much combat as collaboration between people and machines, and the Scunthorpe problem is a perfect example. Entirely innocent words can fall victim to machine filth-filters thanks to unfortunate sequences of letters within them – and, in Scunthrope's case, it's the second to fifth letters that create the difficulty. The effect was labelled in honour of the town in 1996, when AOL temporarily prevented any Scunthorpe residents from creating user accounts; but those who live in Penistone, South Yorkshire – or people with surnames like Cockburn – may be equally familiar with algorithms' censorious tendencies.
The most enduring gift of British comedy series Monty Python's Flying Circus may prove to be a digital one: the term "spam". The key episode, first broadcast in 1970, featured a sketch called "SPAM": the brand name used since 1937 by the Hormel Foods Corporation as a contraction of the phrase spiced ham. Set in a cafe where almost every single item on the menu featured spam, the sketch culminated in a chorus of Viking warriors drowning everyone else's voices out by chanting the word "spam". A satirical indictment of British culinary monotony, it took on a second life during the early 1980s, when those who wished to derail early online discussions copied out the same words repeatedly in order to clog up a debate. Inspired by Python, the word spam proved a popular way of doing this. "Spamming" came to describe any process of drowning out "real" content – and the rest is repetitive history.