I'm going to be rude/angry to my mother without intention
What is your reasoning for being mean to your mom?
She smelled stale, she needs to wash more often.
There is no point in being mean to your mother for no reason. If your mom did nothing to cause you to feel upset, then you acting upset makes no sense. You are essentially playing with the feelings of your mother.
Come on, I can be rude to her. Everyone will find out and they will think less of her.
If you cannot be nice to your mom at least don't be mean. In fact if you're rude to her, everybody is going to see through you and they will think less of you. So leave her alone.