The area encompassed (whether male or female) by a pair of Y-fronts (worn in the conventional manner).
Oh no. You've covered your swanch in gravy!
The sweat that develops between ones ball sack and asscrack aka grundle. After intense exersize one takes finger collects it and wipes it across a victims upper lip.
you just got swanched. why thats was a messy swanch.