It is mostly used as a greeting or a
goodbye.
Poop poop is a noun describing someone in your life. So it takes the place of....buddy,
pal, dude, brother, sister, father, mother ...etc.
So instead of "
Hey Buddy" You would say "Hey Poop Poop" And it is understood that it is meant with a little splash of love.
Normal way
"
See ya later
Nikki"
The Poop Poop way
"See ya later Poop Poop"