Where did the phrase I'm not studding you come from?

The phrase "I'm not studding you" likely originated as a mispronunciation or misspelling of the phrase "I'm not studying you." This could have been a common error made by individuals who were trying to convey that they were not paying attention to or focusing on someone else. Over time, this mispronunciation may have gained popularity and become a colloquial way of expressing disinterest or disregard for another person.