To ram ones finger into anothers anus without warning whilst shouting "FINGER OF DOOM"
me:"hey baby wanna have some fun?"
girl:"with you no thanks"
me:"FINGER OF DOOM"
girl:"OMG MY ASS"
To unexpectidly ram your finger into anothers asshole whilst shouting "Finger of Doom" This is best done to a partner that you no long wish to be intimate with, or date.
Partner: I dont think we should see each other anymore
You: "Finger of Doom"
Partner: *Painfilled expression*