Show Off your Spanish Skills with Idioms & Expressions
There are few things that will make you appear to speak more Spanish than you really do and, right up there with cursing like a local but far more elegant (not to mention useful in any situation), one of the quickest ways is to learn and then use idioms and local expressions.
Idiomatic expressions are something that most foreigners learning any language do not regularly use and mixing them into your flow will make you instantly seem more linguistically adept.
Not only will your language appear stronger than it may (or may not) be, but you also get to learn some interesting vocabulary terms as you acquire these expressions themselves.
It is estimated that some 25,000 idioms exist in the English language (Source) but that is just plain too much to try and tackle. Instead, try learning these 24 funniest expressions from Spain as well as learning this Guide for using slang like a Spaniard and work on incorporating them into your speaking as naturally as possible.