Sticky pork belly is the action of making a fat cum on your partners stomach then mushing your stomach against theirs while snort like a pig.
Becky: Hey destiny, guess what brad did last night?
Destiny: What's that Becky?
Becky: He gave me a sticky pork belly, and then we fell asleep. His mom had to call the fire department to separate us.
Destiny: that's so hot.