Twitter users aren’t exactly renowned for their grammar or good manners. Now a computer science student has mapped precisely how potty-mouthed our tweets are.

(, a project by Carleton University junior Martin Gingras, is a (very literal) real-time map of where in the world people are dropping "the f-bomb" on Twitter. The map pulls from the public Twitter API and uses geocoded data to plot a bomb signpost on the map every time someone uses the curse word. An accompanying Twitter feed also “sporadically retweets” the messages that make the map.

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 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.

Sounds like some people had pretty bad f-ing Tuesdays. View the full map here.