alligator in the cargo bay
A task that was taken on and solved out of a desire to take initiative at work. This is a reference to an episode of The Orville in which Captain Ed Mercer asks Bortus what he has been working on, and Bortus replies that there is an alligator in the cargo bay, but he has crushed it with a chair.
Did I fix the SQL injection vulnerability? Of course, it's an alligator in the cargo bay!