Shaquille O'Neal is clearing the air on his infamous bathroom emergency on "Inside the NBA" last month ... admitting once and for all he had to take a dookie.
Yes, someone is getting paid to write this.
The NBA legend let it all out during his appearance on "The Tonight Show" with Jimmy Fallon on Thursday -- after initially insisting his rush from the TNT desk was to drain the snake, he revealed it was a dire situation involving clenched butt cheeks.
53-year-old Shaq started off his explanation by saying he drank a lot of water that day .