You may also decide to flip at the beginning of a game. Flipping is done on your first turn only, and only until you drop a jack. You continue from there. The first player to complete the agreed upon steps. In Basic Jacks, the first player to complete the challenge of going from Onsies to Tensies and back down again to Onsies.
Fancies are specialty jacks rounds.
At the start of a game, the players will decided how many and what kinds of fancies will be included. There was a huge collection of fancies that were just common knowledge when I was a kid.