Just like any city, Madrid has its own variation of the Spanish language through the use of dialect and slang. Here are some examples…
‘Majo/a’ (pronounced ‘ma-ho’/‘ma-ha’) is used to describe someone who is kind or generous.
‘Mazo’ (pronounced ‘ma-tho’) can be used in place of ‘mucho’, meaning a lot
‘La marcha’ is slang for saying the nightlife in Madrid, usually consisting of bar crawls in certain areas such as Sol, Malasaña, or La Latina.
‘Tío/tía’ means uncle/auntie, but in Madrid it can also mean ‘dude/bro/man’ or ‘chick’.
Also, some of their pronunciations are a little different, for example instead of pronouncing all the letters in ‘pescado’ (fish), madrileños (people from Madrid) often miss the ‘d’ and so pronounce it as ‘pesc-ow’. Other words that end in ‘ado’ such as ‘helado’ (ice-cream) sometimes are pronounced in this way too- this can take some getting used to!