after your woman pleasures you by giving the act of head, directly before you blow your load, you scream out, say hello to my little friend, exploding on her face
To over-power yourself or inflate your own ego as to act crazy or ignorant. Usually the "Scarfacer" either fights someone, engages in doing too much of one drug, or acts a fool in front of the wrong person.
I was scarfacing in front of this chick and got slapped.