| zero hour meaning: the time when something has to be decided (there can be no more waiting) 1. “Well everyone, after 3 weeks of debate, this is zero hour. It is now, or never |
| zero tolerance meaning: no lenience; no breaking of the law will be allowed 1. Recently the government announced it would introduce a new zero tolerance law on drugs. |
| zip it meaning: be quiet; shut up 1. “You know you should have let me do it. I know far more about this stuff than you.” “Oh, zip it. I don’t need your advice.” |
| Z-Day meaning: an imagined day when mankind must fight zombies to the death 1. I don’t know about you, but I want to know how to fire a gun in case Z-day finally arrives. 2. Anne is an incredible athlete. I would want her on my team when Z-day arrives |