a piece of cake

pan comido, muy fácil

• The exam was a piece of cake — I finished in 20 minutes.
• Learning to ride a bike was a piece of cake for her.
• The software installation was a piece of cake, even for beginners.

This idiom is commonly used in informal speech to describe tasks or situations that are very easy to accomplish. It is not formal and is more often used in everyday conversation than in serious writing.

A common mistake is translating the Spanish 'pan comido' literally into English as 'eaten bread'. This translation makes no sense in English and does not convey the idea of easiness.

• in a nutshell
  en resumidas cuentas
• get the hang of (something)
  agarrar el truco a algo
• spill the beans
  irse de la lengua, soltar la sopa
• under the weather
  no sentirse bien, estar pachucho