The ending point in a conversation where one participant introduces consuming one's own bodily waste.
Alin's Law:

Adam: Hey man what's up? Are you going to that show tonight?
Steve: I don't know, who's playing?
Adam: I don't remember, but he eats his own crap.
Steve:silence
Admam: Hello? ...Steve?
by Crapwellz July 24, 2013
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