As it pertains to sex: Choking a woman until she passes out, then shitting in her mouth before reviving her. This precise maneuver carries a connotation of one's having the utmost skill and class. Placing a tortilla chip in the participant's mouth, imitating salsa, brings panache to the bedroom.
My girl Sheila came over the other night and pissed me right off. I choked her with my dog's leash, then proceeded to perform a Chilean Siesta on her lifeless body.
Hay mucho amor entre de Manuel y Lupita. Oi que Manuel la dio una siesta chileana.