Slangs are the expressions which are used in their most informal usages.Slang is language at its most informal, using expressions that many would consider to be grammatically imperfect and sometimes rude. Slang often used within small social groups where it can help draw and keep the group together. It changes very quickly in English.
Cockney Rhyming Slangs are the specialised forms of slangs used in the East of London. This kind of Slang is a kind of antilanguage where words are replaced by phrases that rhyme (sound the same): North and south = mouth Adam and Eve = believe Sometimes, the last word is dropped.
Slangs beginning with Z :
Zeds : (UK) If you need to get some zeds, you need to sleep. (derived from the ZZZZZ used in cartoons to show someone is asleep)
Zilch : 'Zilch' means nothing or zero.
Zit : A zit is a spot or other skin blemish.
Zombie : A zombie is a computer that has been hijacked for use by criminals.