"Bad reflux" refers to when stomach acid flows back up into the throat, causing symptoms like heartburn and a burning sensation. Basically, it means having an uncomfortable stomach acid problem. Full definition
All the prescription formulas have failed in the way that she was still badly reacting to it and has really bad reflux. (westonaprice.org)
I just thought I would add that I have a 6 month old GERD baby with very bad reflux - solids did not help her though my pediatrician said they might (thanks for adding that in this post). (babywisemom.com)
My baby is 9 weeks old and had bad reflux takes forever to drink 3 oz from dr browns's bottle with level1 nipple. (mymilkybaby.com)