The act of applying wall filler to someones bum crack whilst they are unconscious. This will then leave a smooth finish across their backside which you will then apply women's foundation to acquire the correct skin tone. The victim will awaken to believing the he/she never had a butt crack.
"Jack got so drunk last night that we managed to 912 him."
"Jack had such a bad case of diarrhea that we just had to preform an emergency 912."