The classical source expands or derives a specific point from the language of the passuk. The Core Text above is the relevant region of interest.
Type of Learning
Custom (A hyperbolic derasha that applies the language of the verse to people who are completely removed from Torah and refined conduct.)
What Is Learned
Chazal use the strongest possible imagery to express how far a life devoid of Torah and proper middos can sink. The comparison is not literal but serves as a severe warning against associating with those who live without the discipline of Torah and derech eretz.