Not brushing your teeth, definitely. It will make bonster bacteria grow in your mouth, eat your teeth and build cities on your tongue.
If I were lost in an uncivilized wilderness after a plane crash and there was no possibility to clean myself anywhere, I'd still find a piece of wood and chew it until it is a brush to brush my teeth with. I would not mind having greasy hair, I would not mind having dirty clothes, I would not mind smelling like a molding smoked salmon from building campfires of wet wood. But I would brush my teeth.
it depends on the circumstances; if you are not in a sweat building schedule but you are eating a lot of onion rings then not brushing is worse, if you are a plumber fixing a under ground pipe in the middle of the summer and all you have to intake is water then bathing lol
I'd have to say not brushing your teeth. One bath can "fix" days without one, but oral hygene neglected would just continue to get worse and catch up to you.
not bathing!!! its super gross id rather have my mouth dirty than have my hair and body and private parts and toes all dirty and stinky ew
not bathing! i can't stand going to sleep with dirty feet or feeling sticky from sweat. I couldn't go a day without bathing! >_<
Not bathing ... at least you can keep your mouth closed, lol.