What Does Distro Mean?

Distro is IT vernacular for a Linux operating system (OS). It is a shortened version of the term distribution.

Techopedia Explains Distro

In the Linux world, there are hundreds of different flavors of distro. Examples include Debian, Ubuntu and Red Hat (among many others). When referencing a Linux OS, administrators usually ask questions like: Which distro does the application sit on top of? or Which distro are you using?