no matter how many times I freaking brush my teeth, the nasty taste and smell will not go away! I swear I've brushed like 9 times today!!
scrub your tongue when you brush and rinse your mouth with water and baking soda. it does stay gone but it does help
Go see a dentist. They smell usually comes from Calculus and periodontal issues. Also FLOSS, you might have food trapped in between your teeth.