The act of vaginal penetration via doggy style during which the female excretes fecal matter for lubrication upon the male's penis.
Dave: So what did you and Jill do last night?
Aaron: She gave me a little Rocky Mountain Chocolate Factory.
Dave: You mean where she shits on your dick to lube it up real nice?
Aaron: That's the one!
Similar fo the Rusty Trombone just in reverse typical male and female fashion. The male rims out the women and commences diddling her piddle with multiple fingers in a trumpet like fashion.
Dave: What did you and Jill do last night?
Aaron: We started our own brass band!
Dave: She gave you a Rusty Tombone?!?
Aaron: And then I gave her the Rusty Trumpet!
Aaron: And then we each drank a bottle of Listerine so as to not get E-Coli.