When playing the online game 'Drawception
' (a meme
creating drawing game) this acronym will be used when others want you to all draw the same thing. It stands for 'Pass It On' and you will use it in your drawing so that others know to 'pass it on'
"Draw your best skyscraper, PIO"
-You then would draw the skyscraper and write 'draw your best skyscraper PIO' in your drawing so that others know it's a PIO-