This is when two men attempt to smite eachother mightily with their erect, swollen purple-headed members.
Also see sword fighting.
Avast, ye scurvy dog, engage me with your flesh-cutlass and prepare to be boarded!
2 or more males striking their penises against each other untill ejaculation
These dudes totally wanted to swordplay with me, but i was like, "no way bro's i'm not gay!!"