According to Chuggaaconroy in the TheRunawayGuys LP of Pikmin (episode
13), possible
slang for pooping on someone's chest.
More practically, an example of very specific
slang terms that have little actual purpose as they are incredibly niche or raunchy, yet sound like perfectly rational phrases (like deflower either meaning losing a flower... or sex.)
I just went on a date with my fiance, and let's just say the corn smells
nice.
You could say some perfectly reasonable phrase like, I
dunno, "the corn smells
nice", and someone would tell you "OH MY GOD, DO YOU KNOW WHAT THAT MEANS?!"