A keyboard warrior who is a stereotypical couch potato, who is more interested in tell you what to do rather than brushing the crumbs off, getting up of their ass and doing anything remotely appropriate to what they demand of you.
This is a very common phrase used amongst only the very rambunctious humans. It refers to the process whereby one flicks their partners anus like flicking marble but at excessively high speeds. The friction forces generated in the area result in enormous amounts of heat. Once the heat is generated a potato is then placed gingerly against the anus. Thermal conduction heat transfer causes the potato to bake.
Hence the term “bake my potato”.