The phrase "a pretty murky" is correct and usable in written English.
It can be used to describe a situation or concept that is unclear or difficult to understand.
Example: "The details of the agreement were a pretty murky, leaving everyone confused about the terms."
Alternatives: "quite unclear" or "somewhat vague".
"The silver lining to a pretty murky day was the return of Andre Adams, after 2 months out injured".
The wall of separation between Facebook and Oculus is a pretty murky one.
There was something from an earlier episode where Roger's buying fur coats from Don, and the fur coat goes to Joan and not to his wife -- it's all a pretty murky area, do you know what I mean?
The outlook "is pretty murky right now," said Sunaina Murthy, a senior health care analyst for AIM Investments, who says the government is unlikely to do away with many of the higher payments it is giving the hospitals, including the additional money called for in the legislation to care for people in rural areas.
However, the truth is that no matter how personal a body modification may be, tattoo ownership is pretty murky.
For very detailed observations the atmosphere is pretty murky and horrible so it's a real advantage to get above that.
Eldridge Cleaver, in particular, held the pretty murky view that black homosexuals suffered from a sickness induced by frustration at not being able to bear babies by white men.
Details are pretty murky but early photos seem to present a pretty standard miniature laptop.
But then, with the other two, the causes of those are pretty murky and people have tried to come up with a unified theory for these extinctions, but that hasn't worked at all.
"The details are pretty murky," Anthony said.
Pretty murky at the best of times, politics is becoming dirtier by the day.
