When a guy has his woman bent over the front of the toilet and he's hitting it from the back, just before he finishes, he puts her face in the toilet water to enhance their(his) climax.
The Mud Bobber arises when a male experiences explosive diarrhea into a clogged toilet. The affected individual vigorously defacates into the disabled vessel, further saturating the already dense effluent. In a desparate attempt to banish the maelstrom, our anti-hero foolishly chooses to flushes, whereupon panic ensues as the water level rises to approximately 0.1nm below the rim of the bowl. The Mud Bobber is now complete: The hapless defacator's scrotum repeatedly dips into the fecal morass despite his attempts to maneuver elsewhere.
"Dude...I had the worst mud bobber last night after we had burritos. FOR THE LOVE OF GOD, PLEASE FIX YOUR TOILET."
To obtain a full on erection or a semi induced from a an otherwise non-sexual back rub from your grandma, aunt or cousin. Usually occurs at holiday family gatherings and results in sporting a pup tent and having wait to return to a flaccid state before moving around.
Steven was getting a back rub from his cousin Sarah when they were summoned to the table for dinner. Sarah left immediately but Steven sat around for a few minutes because he needed to rid himself of the Fresh Bobber.