Dink Nugget

A small circular-shaped turd that drops in the toilet and makes a splashing sound (or a "dink" sound).

Less commonly used as an affectionate term to one's significant other or sibling, usually in response to something silly that person does.

PJ - "I just made a dink nugget!"

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Connor: "Hey sis, I just fed whipped cream to our hamster!"
Lauren: *Rolls eyes and laughs* "You're such a dink nugget!"