Alabama DBU tweet

The University of Alabama football team sent out a tweet Monday night seemingly challenging LSU and others about which school is the true 'DBU.'

Alabama Football / @AlabamaFTBL

It's a topic of conversation every college football season: Which school is the real "DBU?"

"DBU," of course, stands for "Defensive Back University," a bragging title that schools like LSU use to claim they're home to the nation's top players in the defensive secondary.

After the 2018 NFL combine wrapped up Monday, Alabama seemingly threw a little shade at the Tigers and perhaps other schools like Florida, Florida State, Ohio State and Texas, with a line saying "Some hashtag it, others live it."

LSU had two defensive backs participate in the combine: Donte Jackson and Kevin Toliver. 

"DBU" has been a point of pride for LSU, especially in its recruitment of defensive backs. For example, in the team's game notes prepared each week during the season, there's a section labeled "LSU is DBU."

Here's an excerpt:

-- With two first team All-America defensive backs in 2016, LSU can easily back up its claim as being “DBU”. With the addition of Tre’Davious White and Jamal Adams, LSU has now produced 10 first team All-American defensive backs since 2003.

-- In terms of the NFL, since 2007 LSU has had more defensive backs selected in the NFL Draft (17) than any other team in the nation. Of LSU’s 17 NFL Draft picks since 2007, six have been first round picks and five came in either the second or third round.

The NFL draft begins April 26. The college football season begins Aug. 30. LSu and Alabama play in Tiger Stadium on Nov. 3.