Depending on if you’re in the Big 12 or not, it’s either the last weekend of college football’s regular season or the penultimate weekend of the regular season. Rivalry games dot the schedule, and The Post’s Chuck Culpepper runs them down with aplomb.

Anyway, perhaps you’re curious about how all these rivalries and rivalry trophies got their names. Here are their stories.

Iron Bowl (No. 1 Alabama vs. No. 15 Auburn, 7:45 p.m. Saturday, ESPN)

According to an AL.com story published on Wednesday, the Alabama-Auburn game was first dubbed “the Iron Bowl” by Tigers Coach Ralph “Shug” Jordan in 1964:

Auburn coach Ralph “Shug” Jordan was asked by reporters how he would deal with the disappointment of not taking his team to a bowl game. [Birmingham News sports reporter Jimmy] Bryan recalled Jordan’s response in a 1995 article: “We’ve got our bowl game. We have it every year. It’s the Iron Bowl in Birmingham.”

For years, the Iron Bowl was played at neutral-site Legion Field in Birmingham, Ala. The game’s nickname reportedly comes from Birmingham’s proximity to iron deposits.

Old Oaken Bucket (Indiana vs. Purdue, noon Saturday, Big Ten Network)

First awarded in 1925 after Chicago alumni groups from both schools determined that “an old oaken bucket would be a most typical trophy from this state and should be taken from a well somewhere in Indiana.” They found a suitably old, oaken bucket on a farm between Kent and Hanover in Southern Indiana. The winner gets an “I” or “P” link added to an attached chain.

Egg Bowl (No. 19 Ole Miss vs. No. 4 Mississippi State, 3:30 p.m. Saturday, CBS)

Chaos ensued and spectators were injured after the Rebels snapped a 13-game losing streak to their rivals in 1926, so the two schools decided to create a trophy — the Golden Egg — to help prevent future violence. The trophy — “a regulation-size gold-plated football mounted on a pedestal,” per Ole Miss’s Web site — was proposed by Sigma Iota, an Ole Miss honorary society. The “Egg Bowl” nickname was not bestowed upon the game until the late 1970s, when a newspaper sports editor in Mississippi came up with the name to spice up the rivalry at bit.

Paul Bunyan’s Axe (No. 14 Wisconsin vs. No. 18 Minnesota, 3:30 p.m. Saturday, Big Ten Network)

The Badgers and Gophers originally played for something called the Slab of Bacon, in actuality a piece of wood with a football featuring an “M” or a “W,” depending on who wins, and the word “bacon” on both ends. The winner “brought home the bacon.” Get it? But the Slab of Bacon disappeared after the 1943 game, going missing until 1994 when it was discovered in a closet. The replacement, the Paul Bunyan Axe, “was created in 1948 by the Wisconsin letterwinners’s organization,” per the Badger Herald. The original axe was set to the College Football Hall of Fame in 2003 after it began to show signs of age and ran out of room for the score of each game.

The claiming of the axe after each game is a sight to see, as the winner pretends to chop down the opposing team’s goal post.

Apple Cup (Washington State vs. Washington, 10:30 p.m. Saturday, Fox Sports 1)

The Cougars and Huskies originally played for the Governor’s Trophy — a 40-pound bronze shield — until it up and disappeared sometime during World War II (someone later tried to sell it in bankruptcy court in the late 1990s). The Apple Cup, celebrating the fact that Washington provides about 64 percent of the apples grown in the United States, was first awarded in 1962.