Idiomatic expressions

Idiomatic expressions are phrases that carry a specific meaning within the language. Normally, there is no logical way of translating them word by word. The only way to learn them is to memorize them, and to practice their use. Below, you will find a series of English idiomatic  expressions.
"It's like watching dry"       Algo que es muy aburrido 

“It’s raining cats and dogs” Llueve mucho