When you read or witness something so good, either online or in the real plane, that your initial impulse is to 'Like' it, only to realize you are neither on Facebook nor reddit, you are a likehead. Your fix is the crack of the Internet. Mark Zuckerberg is your Walter White. You will be schizophrenic by the year 2015, and like to vomit if away from a scrolling screen for longer than half an hour.
TV: "...and the Boston Red Sox are the 2013 World Series Champions!!!"
Melvin: "Like!"
Trisha to Shelby: "What a likehead! Let's go see if we can tip him over.."