The Bog is the area between the
genitalia (usually male) and the asshole. This area is also known as
the Taint but when it is
particularly sweaty, slimy or not clean it is referred to as "the bog".
After having
sloppy sex all night and then going for a jog. Kenny declared, "Man, my bog is sweaty."
Alan had a sweaty bog because he refused to shower for a week.