"not I" said the duck
This is a quote from a children's book. T is basically a way to say ABSOLTELY NOT but in a more chill tone. Kind of like: "I don't know what y'all are talking about- I know it ain't me."
Person: Who's gonna come with me to our high school renunion?
Me: "Not I" said the duck.
Me: "Not I" said the duck.