The intersection of 2 joints perpendicular to one another so that they form a cross with 3 ends that must be lit. As the joint is smoked the reefer smoke forms a bottle neck for the perfect trifecta hit. Best if rolled with weed that smells like "gods vagina".
"this is like the apex of the vortex of joint engineering" = crossjoint
by devfb December 12, 2007
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