Definition
To hang around or loiter.
How People Actually Use It
The greatest thing Neil Patrick Harris has ever been in. It it a Musical Comedy, roughly 45 minutes long, about a city villian who wants to make it into the Evil League of Evil, defeat his Arch-Nemisis Captain Hammer (corporate tool), and impress the girl of his dreams. Has many hilarious quotes, and a large fanbase.
""Did you see Dr Horrible's Sing-Along Blog yet?' "Naw, dude, I was too busy" "*shoots kneecaps off of the other guy*""
Source: Urban Dictionary