"Taking A Gargoyle Shit" is the act of perching oneself
on the toilet bowl as though they were a gargoyle in order to
encourage the flow of the bowels.
This is often seen as a dangerous act if one is not careful: shit may spew.
This is also considered a dangerous act if one is perching oneself on an unsturdy
toilet bowl: glass will shatter, then shit will spew.
John: Oh, man, Dan took a gargoyle shit last night. It didn't end up
very well.
Michael: Why not, bro?
John: Well, he spewed too hard and
shattered the glass and now he's down at the dean's office talking about how he's going to pay for the dorm's toilet.
Erica: I broke up with Anthony last night.
Jenna: How come? You guys were doing so well.
Erica: He took a gargoyle shit and ruined the toilet in my
grandmother's house.