When you put four fingers in a woman’s pussy and your thumb up her ass.
I sent her straight to nirvana with that five finger death punch.
When a person soaks their fingers in the spiciest sauce they can find,then proceed to put all five soaked fingers in an orifice of the said person's partner.
Guy 1: yo, why are your fingers reddish?
Guy 2: my boyfriend wanted a "Five Finger Death Punch"
Guy 1: Jesus, Is he okay!
violently thrusts fist into your significant others choochie until death
bf: i’m going to five finger death punch you when we get home
gf: omg plz do