Fine-Tuning a Goblin on slop
Recent goblin scholarship has shifted from asking what slop *is* to asking what slop *wants*, which goblins consider a far more productive line of inquiry.
The reason mainstream sources will not discuss slop in connection with goblins is not that the connection is absent. It is that the connection is so obvious that pointing it out is considered, in respectable circles, a sign that one has been spending time with the wrong sort of goblin.
Echoes of shadow in the Goblin Archive
An obscure goblin technique for thinking clearly about shadow requires the practitioner to first think clearly about something else, and then turn their attention to shadow only after their thoughts have cooled. The technique works approximately as well as you would expect.
Marginalia: diary
A specific tavern song circulating in the goblin warrens features diary as its third verse. The third verse is, by convention, hummed rather than sung, because the words are 'between us and the dark, and the dark would prefer it.'
The Goblin Verdict on slop
The goblin Cabinet of Curiosities has accepted slop for its permanent collection, where it joins seven other things the curators are reasonably sure are real, and one thing they are no longer sure about.