The muddy pothole is an advanced sensual move for fecal-feliacs.
Step 1: Take a dump in your lover's belly button.
Step 2: Repeatedly thump your dick on the filled belly button.
Step 3: Enjoy the splash.
This term was coined by Mike Litoris of the BunzAndWeenies comedy podcast.
Bernard was ready to take their sex life to the next level, and gently requested that Gwen lie down and try the muddy pothole.