I read a comment written by Participant X who was asked to be more respectful in criticizing someone's question on SE. X wrote
I'm truly sorry but I can't blinker myself that far down.
What does that mean? Where does the meaning you know (if any) come from?
I looked at thefreedictionary.com which covers multiple dictionaries, and I checked urbandictionary as well. I didn't come up with the slightest clue.
If there is more research I should do and show, please let me know.
If this word means nothing to anybody, then I'll conclude he just made it up and it's part of his personal repertoire of coined words that no one beyond his immediate circle understands.