Delope (French for "throwing away") is the practice of deliberately wasting one's first shot in a pistol duel, an attempt to abort the conflict.
The Irish code duello forbids the practice.
Deloping may be the best strategy for a duellist with lower accuracy than both his opponents in a truel (against rational opponents) when he is given the first fire.
Both opponents will recognize each other as the biggest threat and aim at each other and so leave the deloping shooter unharmed.