A very hard and rather smelly stool that when one tries to crap it out it doesn't seem to move much. An individual may be sitting on the toilet for half an hour to an hour trying push this little shit plug out of his ass. It is as though a sizable piece of wood were lodged in and plugging the anus.
An individual asks his friend, "Why is that individual taking so long in the washroom"?
"Give him some time, he has a "woodchuck " up his ass"
"Oh I see"