Mess up

Juan: No wonder your luck's been so bad recently.

Luis: What are you talking about ?

Juan: Your apartment's Feng Shui is all messed up.

Luis: You getting superstitious on me again ?

Juan: You have a beam right over your bed.

Luis: So what ? It keeps the ceiling from falling on me.

Juan: It also cuts your energy in half while you sleep. You should put some fabric over it.

Luis: Well, it would look prettier that way, I guess.

Explanation :

Mess up - something which has been done badly

Example : He made a real mess-up of the sales figures.