From the muck

A figure of speech to describe someone who talks in a sardonic and distorted voice to describe disgusting things, not in a humorous way, but as a complaint that may come as disturbing and annoying to some as it might sound weird for the way the sayings are enunciated from the person.

This nagging woman is so cynical and impulsive that her complaints have no sign of understanding or grace for the feelings of anyone, and she talks with a derisive and annoying tone, like she's from the muck!