Poison
From WikiManual
Poison is stored by using .strpoison and is fired automatically. You can see how much poison you have stored by referencing .poison. Poison is a defence against -1 shots. If an enemy -1 shot hits you, you will fire poison back at your attacker. When poison hits an enemy, one of his memory locations will be set to zero for a period of time. The memory location specified in the .ploc of the bot that fired the poison defines which memory location will be affected.
Popular Poisons
.eye5 .ploc store
Blinds your enemy
.shoot .ploc store
Prevents your enemy from shooting
.refeye .ploc store
or
.myeye .ploc store
Causes the enemy bot to attack all other bots indiscriminately (if he uses a refeye/myeye based conspec recognition system).