A take on "pwnt", which is a take on "pwned" which is a take on "owned".

Pwned came around through the common misspelling of "owned" (due to the close proximity of O and P on the keyboard), and althought originally a typographical error, through its overuse it entered the vernacular as a word in itself. The -t suffix being used to replace -ed is self explanitory, adds a heightened level of leetness to leet insults.

The r- prefix stands for "royally", and thus, translates to "royally owned".

When you eat dirt for the first time and leave your family to build a shack in the woods

A take on pwnt, which is a take on pwned, which is a take on owned. Sometimes means royally ownt.