What is the meaning of they got their granny panties in a bunch because minnesota didn't cover the spread.? - Question about English (US)

Definition of they got their granny panties in a bunch because minnesota didn't cover the spread. Wow, there is a lot to cover here. It has to do with sports gambling, where a bettor places money on a team that he thinks is going to win. First, Minnesota is the name of a state in the US, and they have an American football team called the Minnesota Vikings. Second, "the spread" is a gambling term, which means the number of points that a team is favored to win. The spread is used to make the chances even for both teams to win money for their bettors. That is, let's say the Minnesota Vikings have a very strong team this year, and they are going to play their next game against the Las Vegas Raiders, who are very weak this year. Without a spread, most people would bet on the Vikings to win, because they are so much stronger than the Raiders. So the gambling houses will come up with the point spread, which is the number of points they think the Vikings will score more than the Raiders. In this example, let's say the gambling houses think the Vikings will score 7 more points than the Raiders in the next game, so they will set the spread at -7 for the Vikings (or +7 for the Raiders). What that means is if someone bets on the Vikings, the Vikings will have to win by more than 7 points for the person to win their bet. If someone bets on the Raiders, then they will win their bet if the Vikings either win by less than 7 points, or the Raiders win the game outright. Final score: Vikings 21, Raiders 7 >> Everyone who bet on the Vikings will win. Final score: Vikings 7, Raiders 21 >> Everyone who bet on the Raiders will win. Final score: Vikings 21, Raiders 17 >> Even though the Vikings won the game, they didn't "cover the spread" (win by more than 7 points), so everyone who bet on the Raiders will win. Final score: Vikings 21, Raiders 14 >> This is a special case called a "push," where the point difference matches the spread. No one wins and everyone gets their money back. Getting your panties in a bunch means getting very upset over something that's not that important. Panties are women's underwear, and there is a stereotype that women get very upset over minor (small) things. So to go back to your original question, a lot of people got very upset over the outcome of a football game because even though the Minnesota Vikings won the football game, they didn't win by more than the points that they were supposed to, and it cost everyone who bet on the Vikings their money.
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What is the meaning of they got their granny panties in a bunch