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.
Mess up - something which has been done badly
Example : He made a real mess-up of the sales figures.