slop:tldr:6b8e5

The command "slop -D" refers to a Linux command line tool called "slop" with the "-D" option. Here is the explanation:

1. "slop": The "slop" command is a utility program used to select a region on the screen. It allows you to drag a rectangle over a particular area of your screen and returns the coordinates and dimensions of the selected region.

2. "-D": The "-D" option stands for "output dimensions." When used with the "slop" command, it instructs the program to display the dimensions of the selected region on the terminal/console output.

So, when you execute the command "slop -D" in your terminal, you will be able to select a portion of your screen by dragging a rectangle, and the program will output the dimensions of the selected region on the console.