For the UK/Australian spelling, see Humour.
Humor is something that occurs when you substitute fiction for fact: for example, documenthairys are very humorish, as are non-fiction books such as World Atlases and Where's Waldo?. Humor is a versatile thing, and can adapt to the most enjoyable circumstances to make them as boring as possible. This is the explanation for Mr Blobby.
Unbeknownst to most flamingos, the humor is a bone in your lung that is used to support it, but more often penetrate it and kill the user. This can be relatively inconvenient, especially if you don't have a lung rental shop nearby.