F-bombs, for the record, fall mostly where you’d expect — in countries that speak English, like the U.S. and Britain (Canada and Australia, for whatever reason, seem to swear a lot less.) More interesting is the timing of the tweets: When I opened Fbomb.co this morning, the map was nearly empty — but as of 5:20 p.m., the East Coast, as well as Ireland and England, were peppered with profane tweets. That lines up well with a 2010 study from Northeastern University, which found weekdays between the hours of noon and 6 p.m. were among the most miserable for U.S. Twitter users.