Culture shit:

Slang:
Faders: Slang for Ascendants. Usually said with contempt, carries a negative connotation. Knights and Ascendants in particular don't get along terribly well, but the Ascendants don't have any rude words for them. 

Line Huggers: Those who live near the Last Line, on either side of it. Though the Line divides where the Protectorate has control, city-states who live near it often have more dealings between each other than the Consortium would like. Line huggers under the Protectorate are usually more sympathetic towards those who aren't. They're more likely to petition for help from Consortium troops for unaligned humans. 

Broken Triangle: Actually a hand gesture. To hold one's hand with the thumb and forefinger at roughly a 33 degree angle. Represents just one corner of a triangle. It started out between members of other Realms in the Consortium, meaning to say "We don't need your kind," but over time it's been adopted by civilians and now carries a meaning roughly equivalent to a middle finger. Often done quickly by flicking the forefinger off of the thumb. 

Though the enmity between Knights and Ascendants is mutual, the Knights are the more openly aggressive of the sides.

Triangles: A triangle is a sign of the Consortium, often stylized in some way(note the picture for Aurelia: A triangle with an eye. She's a Consortium sniper). Each corner(not each side) represents a Realm.