| zap | Verb. To cook food quickly in a microwave oven. [Orig. U.S.] | 
| zapper | Noun. A remote control unit, typically for a audio visual technology, e.g. a TV. | 
| zeppelins | Noun. Women's breasts, usually implying of a large size. Probably abbr. from the expression 'like a dead heat in a Zeppelin race'. | 
| zhoosh | Verb. To tidy or make more attractive by styling. Also as zoosh and zhuzh. [Polari] | 
| zhooshy | Adj. Stylish, attractive and extravagant, showy. Many spelling alternatives including shushy, jujjy, zuzshy. [Polari] | 
| zilch | Noun. Nothing, zero. [Orig. U.S.] | 
| zip it | Verb. Stop talking, shut up. Usually in the imperative. [Orig. U.S.] | 
| zit | Noun. A spot, pimple or boil on the skin. [Orig. U.S.] | 
| zonked (out) | Adj. Worn out, tired. E.g."Any chance we can have a rest? I can't go any further, I'm totally zonked." | 
| zoot | Noun. A cannabis cigarette, a 'joint'. | 
| Z's | Noun. Sleep, a nap. Pronounced zeds. E.g."I think I'll get some z's before we leave." |