A skidmark often found in Mormon Underwear. This is a very common phenomena, as Mormons are not allowed to remove their undies and eventually dig deep while scratching their ass.
Jacob tried to avoid leaving a Mormon Trail by placing Mormon Panty Liners in his buttcrack. Unfortunately he enjoyed the sensation a little too much and woke up one morning with Mormon Crotch.
The nice little path of hair running from a man's belly button to his happy place. The trail that leads to paradise.
I hate when men shave or wax too much because there is nothing as tempting as the Mormon trail showing just above his jeans.