Sclarping is a portmanteau of scatalogy and LARPing. This refers to the practice of LARPing (Live-Action Role-Playing) while indulging in scatalogical fetishes.
Arthur: Man, that was a good sclarping session.
Ted: Yeah, my armor's totally covered in shit!
The sound one makes while attempting to suck in air when being choked or strangled.
Mary Sue sclarped as her attacker strangled the shit out of her, but she got no air and slowly died.