Question

all or nothing
1. Lit. everything or nothing at all.
  Sally would not accept only part of the money. She wanted all or nothing.
  I can't bargain over trif les. I will have to have all or nothing.
2. Fig. [the best] time to choose to do something or not to do it.
  It was all or nothing. Tim had to jump off the truck or risk drowning when the truck went into the water.
  Jane stood at the door of the airplane and checked her parachute. It was all or nothing now. She had to jump or be looked upon as a coward.