Hack the Gibson, is a phrase which originated from the movie Hackers, and is generaly used either with some degree of compliment to another person, or as a sarcastic term directed at those who request the steriotypical 'How to Hack' posts, usually an unskilled, unwilling to learn 'script kiddie'.
Positive: Man, that server was so locked down that it was like trying to Hack the Gibson.
Script Kiddie: I wan7 70 b3 a 1337 h4x0r!11!! S0M3ONE T34CH ME TO HAX0R PLS!!111!!!