ninja

v: to steal sneakily
n: an extraordinary force at something (usually athletic)
n2: an ancient Japanese spec-op
adj: to be as cool as a ninja
adv: to do something in a way that a ninja would do it

v: Yesterday I totally ninja'd this book from you, here you go.

n: Yeah, Richie's a ninja at dodgeball, he once vaulted Tommy to dodge an attack.

n2: Ninjas are cooler than pirates.

adj: OMG! This movie is freaking ninja! (Yes, I'm talking about Donnie Darko)

adv: Check this out! I can ninja laugh! *does not laugh*