1) Swiftly killing a large group of people.
2) Killing someone with a shitty weapon.
3) Surprising and killing an enemy from behind.
4) Flashing a large group of enemies (and yourself) and charging them with a Mac10 or TMP.
5) Doing any of the above in a hilarious fashion.
"pc rushdown killed Mr. Apple with mac10"
"pc rushdown killed sean with mac10"
"pc rushdown killed ripened orange with mac10"
"pc rushdown killed getchawigsplit with knife"
Don-Vito: lol nice rushdown pc
pc rushdown: pew pew
DippingBird: pew pew