Idioms are ‘expressions’. They are very interesting. Vamos aprender some:
‘Bone tiring day’ :
Day em que você estudou or trabalhou tanto que até os seus bones ficaram tired.
Eg: I had a bone tiring day so I need to take a bath and relax.
‘Couch potato’ :
Person que senta no couch (=sofa) e fica lá watching TV, drinking beer and eating chips… Até que se transform em uma big ‘couch potato’ !
Eg: My brother is a couch potato. He sits on the couch and watches TV all day.
‘Chicken’ :
Person que tem medo de everything.
Eg: Don’t be a chicken. Go for it !
Quer conhecer more idioms? Access http://www.talkenglish.com/speaking/idioms/category1.aspx to expand your idiom culture.

IMAGE COURTESY:
• dog: http://detroitduchess.com/wp-content/uploads/2016/07/Sport-Tired.jpg
• couch potato: http://www.clipartkid.com/images/228/couch-potato-9d8qsX-clipart.png
• chicken: http://p1.pichost.me/i/64/1886902.jpg
IMAGE COURTESY: IMAGENS INTERNAS AO POST:
• skull: https://www.google.com.br/search?q=tiring+day&tbm=isch&tbs=simg:CAQSlQEJWu6f5SKAInkaiQELEKjU2AQaAggJDAsQsIynCBpiCmAIAxIo5wm0FOYJtRSnCuQJhhTnCLcUigm3KbkptCnQN4g4uDW1Kfsozze2NRowA86vWuI2ye74fuVE4DEDz1yi9qjMZony0z-A5iHKCXY2ksCowNoat-f7XJoMA3tbIAQMCxCOrv4IGgoKCAgBEgRaFK3ZDA&sa=X&ved=0ahUKEwjOm6ieuuzQAhWMGZAKHcuFCY0Qwg4IGSgA&biw=1270&bih=532
• man on the couch: http://assets.nydailynews.com/polopoly_fs/1.1311952.1365539800!/img/httpImage/image.jpg_gen/derivatives/article_750/shutterstock-couch-potato.jpg
• chicken: http://www.proformre.com/wp-content/uploads/2014/06/Scared-Chicken-1024x872-1024x872.jpg