A medical condition, in which a hispanic third party states that someone suffering from any number of medical ailments. Typically associated with asthma, pneumonia, allergies, or any lung disease.
Doctor: Good morning Mrs. Jiminez, what seems to be the problem with your baby today?
Mrs. Jiminez: Chicken bref!!!
Doctor: I'm sorry?? what was that???
Mrs. Jiminez: I jest told jew, Chicken bref. Che started coughing last night, an her nose was running, an now CHICKEN BREF!