to wash your mouth with lemon juice
to do anything and everything humanely possible to make someone with whom you interact on a daily basis stop swearing.
Example:
mother : Daniel, I literally need to wash your mouth with lemon juice, now. Your teacher just called me to say you have a vocabulary problem,
son : why should I stop swearing? Make me.
mother : Daniel, I literally need to wash your mouth with lemon juice, now. Your teacher just called me to say you have a vocabulary problem,
son : why should I stop swearing? Make me.