Here's a breakdown of the phrase:
* sobs: This refers to the act of crying loudly.
* snifflessmiles: This is a made-up word, a combination of "sniffles" and "smiles." It suggests a smile that is accompanied by sniffing, perhaps due to a cold.
* sniffles: This refers to the act of sniffling, which is often associated with a cold or allergies.
* predominating: This means "occurring more frequently or being more noticeable."
Therefore, the phrase is intended to evoke a picture of someone who is crying, but also trying to smile, with sniffling being the dominant emotion. It's a juxtaposition of emotions that doesn't make sense logically, but is meant to be funny and perhaps even a bit sad.
The phrase is likely meant to be used in a humorous context, perhaps to describe someone who is trying to be brave but is clearly upset, or to mock someone who is being overly dramatic.