Noun: Spunk, jism, come baby gravy. There is actually a brand of anchovy paste in Britain called The Gentleman's Relish - Patum Peperium. Coincidentally, it's rather salty.
"Gentleman's Relish" (n), syn "duck butter". A smelly, warm, wet film comprised of sweat deposits, dead skin, water, pubic hairs and similar miscellaneous detritus that collects between the male scrotum and thigh.