Having unpleasant breath can be quite embarrassing, especially in social situations. If you're looking to express this situation in a more polite or subtle way, you can use alternative synonyms for the term "foul breath". Some possible options include bad breath, offensive breath, sour breath, stinky breath, malodorous breath, or even just breath that smells bad. Whatever term you choose, it's always a good idea to maintain good dental hygiene to avoid this unpleasant problem. This might include brushing and flossing regularly, using mouthwash, and avoiding foods that can cause bad breath, such as garlic or onions.