When having anal sex, So hard that when pull out your penis out its covered in blood, and wipe it just above your partner's top lip resembling a bloody mustache.
After anal sex the guy pulls out and gives himself an authentic Mexican mustache with his own finger
Bob pulled out of Tom's dirty asshole and wiped the remnants from his own dong on his upper lip to give himself a sweet succulent Dirty Rodrigues Mexican mustache.
The same as the dirty sanchez, but with two men instead of a male and a woman. A.K.A fithy bum sex, then rubing the shit (Actual shit, feces or poo poo) on the dick on the partner's upper lip.
Paul and Sam had a great night of listening to Sir Elton John and dirty rodrigezing each other.