I heard it from the same friend who taught me about “Beaching a steamer.”
Similarly, on Family Guy when Brian pees himself at the grocery store and Stewie says “Someone get Rover out of here before he decides to bend a fresh biscuit on the conveyer belt” - I was like “WTF?” and my friend had to explain what “bend a fresh biscuit” means.
Yes. It’s a term we used when we were kids, 30 or 40 years ago.
My sister’s nickname for our dog was Ralphie Pinchaloaf. Don’t ask. 
I may have heard it earlier, but I remember it only from Family Feud.
According to one etymology, the English word “shit” is cognate with the German schnitt, i.e., clip, cut, crop, snip (rough equivalents of “pinch”).
Lights a Match
I guess we’re all threadshitting on this poll.
The first time I heard this expression was on the Andy Dick show, when he was doing a parody of those Ghost hunters shows. He steps into a bathroom and screams,
“OH MY GOD IT SMELLS LIKE THE DEVIL PINCHED A LOAF IN HERE!” :eek:
I was able to connect the dots on the meaning. 
Safe for work.
You mean “a Marine”, of course.
Dropping off the kids at the pool?
I tend to use “Giving birth to a Carlton supporter”
HAHAHAHA I’m going to use that (somehow) on the sister in law that I wish would stop talking to me forever.
Go 'Pies.
I understand the phrase, and would comment further, but I’ve got a turtle head poking cotton, and I must excuse myself.
“Taking a shit” and “giving a shit” are both wrong.
Brown bear is poking his nose out of the cave, or I’d comment too.
I feigned shock when a guy used it at work. He apologized profusely saying he assumed I wouldn’t know what he meant. I assured him I was not damaged by hearing it.
Same here. I’ve got one prarie-doggin’.
Unless you collect shit.
It means blowing a snagger, naturally.
On the other hand you’re probably one of the only people here that would know what “crack a fat” means.