The act of growing a manly beard, taking a shot of hot sauce without swallowing, and going down on your girl (or your friends girl) while the hot sauce causes a hot steamy but slightly painful sensation with the assistance of the beard smearing the juices around. In this situation, the woman is typically handcuffed to something without knowing the splunk muff crunk is about to occur. Failure to restrain the subject may result in punches and cuts.

When you eat dirt for the first time and leave your family to build a shack in the woods