A period of time, usually 2-3 days, where someone has absolutely no sleep, and consumes anywhere between 60-500mg of Adderall. Occasionally mixed with alcohol and other drugs, Adderall benders are known to have a killer ending.
Jimmy - "hey Larry how was your weekend?"
Larry - "Had an unreal adderall bender, started off friday night with 60mg of adderall and a mickey of vodka, ended sunday 120mg and dying later that night"
Jimmy - "christ mate sounds like you beat both our records!"