( MR ROBOT SPOILER WARNING )
The central event and massive cyberattack in the TV series Mr. Robot (2015–2019). On May 9, 2015 (the date chosen as Elliot Alderson's father's birthday, hence "5/9"), the hacker group fsociety (led by Elliot, with help from the mysterious Dark Army) executed a zero-day exploit targeting E Corp (nicknamed "Evil Corp"), the world's largest conglomerate holding massive debt records.
The hack erased all consumer debt data stored by E Corp, effectively wiping out trillions in loans, credit card balances, student debt, etc., for
ordinary people. Fsociety framed it as revolutionary wealth redistribution against
corporate greed, but it backfired hard: it crashed global markets, caused economic chaos, job losses, riots, suicides, and power struggles. Later seasons reveal layers like the Dark Army's hidden motives, Stage 2 plans, and Elliot's
dissociative identity disorder tying into the plot.
In online fandom, blackpill/incel-adjacent, or hacker/edgy communities, "5/9" gets referenced as the ultimate "system takedown" or anti-corporate rebellion symbol—sometimes memed ironically or glorified in dark humor, though the show itself shows its devastating unintended consequences.