The name given to Israel by the Romans after they conquered the area. THe name comes from Philistines, Israel's sworn enemies. Those who call themselves Palestinians are not related to the Philistines in any way, but only took the name so they would seem like a separate people, in an attempt to drive the Jews out of the region under the pretext of getting their own state.
"Palestinian": I want my own country
Person who knows history: You have one. It's called Jordan.
"Palestinian": It's too far.
Person who knows history: It's like 2 miles away.
"Palestinian": Well, my legs are very tired and I'm already settled and... (blows self up to avoid any more of logical conversation)