What does it mean when a girl says Stahp?

Excuse me, could you please clarify what you mean by "Stahp"? Is this a common phrase or slang term that I'm not familiar with? Is it a way for a girl to express a desire to stop something, perhaps in a playful or humorous manner? Or does it have a deeper meaning or cultural context that I'm missing? I'd appreciate any insight you could provide to help me better understand the meaning and usage of this phrase.