a.k.a. "Manch Dressing"
Sperm, semen, ejaculate, cum, jizz... what have you, manch is what some people like to refer to their penile secretions, especially when said fluids resemble the color and consistency of ranch salad dressing.
Hey baby, you look like you could use some manch dressing on that pube salad!
When one individual needs to defacate and another does not, the former individual places his anal sphincter adjacent to the latter's sphincter and proceeds to defacate into the latter's rectum.
Person 1: Ugh, I really have to shit.
Person 2: I just emptied out a little while ago so you wanna' farge?
Person 1: That would be sweet!