Immoodiately
When you're really not on the mood to play or be fussed and your partner isn't taking you seriously. You envoke the word immoodiately and they have to stop doing whatever it is immediately or you will be in a genuine bad mood. You mean it, you're not playing. It is a mood safe word and you both agree to stop when envoked.
Stop tickling me. Stop it. Immoodiately.