A thick gravy-like residue which forms on the testicles and inner thigh created by the build up of smegma, cum, piss, and sweat conjoining into a homogeneous mixture.
Girl 1: Oh my gosh there's jason!! YOU SHOULD ASK HIM OUT!!
Girl 2: Nah, Samantha told me the last time she slept with him he had barnacle sauce.
Girl 1: Oh gross.
3👍 1👎