Occasionally I’ve thought about asking this, but this thread title finally prompted me to do it.
My dad had an expression, ‘pee-waddlin’ piss’; as in ‘That motorcycle beat the pee-waddlin’ piss outta me!’
Now I see ‘pee-widdling’. Which is more prevalent? When and where did it originate?
I have never heard “pee-widdling” before, only “pee-waddlin.” I assume that it has something to do with how people might walk funny when they have a full bladder, and there may or may not be something sexist to it. I have no idea why it might be sexist. I just wouldn’t be surprised if it did since I only heard it during football practice.
My high school football coaches (1979-1982) used “pee-waddlin” to modify pejoratives. As linemen, we were taught how to “knock the pee-waddlin’ snot out of 'um!” I never figured out how snot could waddle like someone with a full bladder, and I still don’t have a clue about it. We discussed this one during water breaks and never made much sense of it, not that we really tried.
So the phrase at least goes back to the 1980s in East Texas, and the coaches probably learned it from their coaches. For all I know, Cotton Hill (Hank’s dad on King of the Hill) may have invented it.
Early-'70s, at least, in California.
My great grand mother used “Pee-waddin” when I was a child, in the early 50s.
One of my college professors used the phrase “scared the pee-waddin out of me” once while telling a story. Never heard it before or since. Always wondered where that came from.
“If you don’t stop doing that, I’m going to slap the pee-waddlin’ soup out of you.” “That scared the pee-waddlin’ soup out of me.”
Never heard “pee-waddlin’” followed by anything but soup. I know I heard her say it in the mid- to late-1940s.
What she said came to mind out-of-the-blue early this morning. Then I was reminded of it again when I saw a three- to five-year-old boy clutching his genital region – quite obviously needing to micturate.
Brrainnnsss!!! Pee-waddlin’ brainnssss!!! 
Brain and brain! What is ‘brain’?
'Pinky’s cellmate?
(I’m not sure if I’m followin’ ya, Johnny.)
This.
Aha! Though I have to admit, that episode was a little too…
(save yourself; move to the next thread!)
…brainy for me!