A classic dad insult for someone who is moving very slowly or not at all, particularly in traffic. Great for use in traffic when the guy in front of you is just sitting there with a green left turn arrow.

It's origin might be drawn from a situation where someone is so slow or lazy, that they pee their pants while sitting on the couch, hence sitting in a puddle of their own pee. But the word could just as easily be from a random combination of words thrown together in the heat of road rage.
Idiot 1: Sitting in car texting while the light turns green
Dad 1: *Beeps horn* Move your as* you puddlebutt!
by JobeOneKenobi July 12, 2020
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An instance where excrement has turned wet or overwhelmingly soggy because of excessive consumption of alcohol or bad diet.
"I drank nine Red Bulls last night and woke up with a bad case of puddlebutt."
by O-bone April 15, 2007
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