Meaning to make a prediction or claim in a very public manner, only for the exact opposite toe come to pass. Usually in a very embarrassing way. Can be used as a verb, adjective or noun.
It is derived from Pro-Putin retired American Lt Col Douglas MacGregor, who has repeatedly made ridiculous claims about
Russian success and imminent victory in the
war in Ukraine. On dozens of occasions, he has made predictions only for events to transpire in a way as to effectively be the exact opposite of his prediction.
For example; On the
29th of August 2022, he said
Ukraine's army had been destroyed, and they would never mount a counter offensive, and that only delusional people believed that there would be a Ukrainian counter attack. And that Russia was preparing to strike out from Kherson and capture
Odessa in the South, and send an armored column to capture Kharkiv city. Within days, Ukraine launched the biggest offensive by either side of the whole war, expelling the Russians from Kharkiv oblast, capturing over 200 Russian tanks in perfect working order, and then moved south to retake Kherson. Russia never moved towards Odessa or Kharkiv in the days, weeks or months following that statement.
Example:
Verb; Last night I was with a girl, but I totally Macgregored thinking blow would help me keep it up. It was limp as can be.
Adjective; I was really hoping your
quarterly returns would be much better. But after looking over them, I see you really did a
Macgregor job.
Noun; You can pretty much guarantee anything that dodgy
used car salesman tells you will be a Macgregor.