1."myspace jackin"is when somebody steals the picture of somebody on myspace & then uses the stolen picture claiming it's there.
2."myspace jackin" is also when a person steals a text freestyle verse off of myspace and then uses it on another hip-hop forum site claiming it's their work.
"yo somebody has been "myspace jackin" my profile pics.
"he didn't write that battle verse himself he was "myspace jackin".
MySpace jackin happens when a dude finds a really hot picture of a girl and, you guessed it, pleasures him self to it
Last night, Jeff decided not to go out, but spent an hour MySpace jackin to some pictures of an underage girl that he didn't even know