(v): The act of changing a friend's status on facebook (while they are not paying attention) to something that infers that they enjoy the music of Nickelback and thus, are a homosexual
(n): A specific occurrence of one of these breaches of trust
Roommate 1: I'm gonna go grab some drank outta the fridge
Roommate 2 (aside): Time to nickelhack!
Status: "Downloading the Nickelback discography! Can't wait to sing Photograph at the top of my lungs!"