The act of two males slapping an individual on either side of his or her face simultaneously with their penis'. The act is performed while the victim is not unexpecting, preferably while sleeping. The individual's face is "sandwiched between the two penis', hence the name "dick sandwich."
Josh: Hey, Mark
Mark: Yea Josh
Josh: Sean passed out... wanna give him a Dick Sandwich?
Mark: Hell Yea!!!
Mark and Josh: DICK SANDWICH!!!! (while performing the act)