adj. Bring your own crack, mothertrucker.
Real citation: "its a BYOC party (bring your own crack)...I will supply stolen natural light from firefighter dave's personal collection."
(urt, Nov. 27, 2003, http://ceg.ognnet.com/forums/viewtopic.php?p=3864&sid=4a1b3e2329181c5b6acba97ca772256f)
Made-up citation: "Indiana Jones said, 'Don't bring a knife to a gunfight,' much like my mom, who said, 'Don't bring a potentially lethal speedball cocktail to a BYOC party.'"