The placement of one's foot behind his head during a sexual act. Usually preformed while having sex in the doggy style position. It has been said that if done correctly the other sexual partner will BIG O continuously for one minute. P.S. attempt with CAUTION
Dave DiSano was seriously injured while attempting the mega bone on an unsuspecting female.
"ur mum gey"
"no u"
"ur mum the big gey"
"no u"
"UR MUM THE MEGA BIG SUPER GEY"
*dies in huge ball of death rolling down a volcano with lava all over it and spikes*