The act of interrupting someone's yawn by sticking your finger in their mouth just as they start to yawn.
Jane was yawning and Derrick dirty santos'ed her, now she wants to yawn but can't!
by happybirthdayd January 01, 2011
A variation of the the Dirty Sanchez, this time leading to a soul patch.
Hey man whats that on her chin, oh I see, it appears that she has been the recipient of a Dirty Santos.
by JoJo1981 January 09, 2012