A Latin term, loosely meaning "of the fact". An adjective describing something that exists or happens as a result of tradition or culture. Not normally used as an urban slang term, but as a historical/legal phase
Even after slavery was outlawed by the govrnment, de fato discrimination still existed in many areas.
There are de facto countries around the world, such as Transnistria, Northern Cyprus, and Somaliland, which the world community refuses to recognize as real countries, despite having their own governments, flags, military, and so forth.
Ashley and Tim are in a de facto relationship. Even though they claim to be single, they're always together and have been for over a year. Duh...
English is the de facto language of the United Kingdom of Great Britain and Northern Ireland, but gaelic languages are used in many parts. This is so those "not frum rownd ere are ya?" don't know when people are going to rape a sheep. See welsh or wales
Someone who acts as the leader of the group, without having any votes to assign them to that position. They are the ones who keep the group together and makes all the difficult decisions.
James: So who is the leader of the Mystery Club?
Calvin: While nobody put it up for vote, David is the one who acts as the de facto leader of the group.
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.