Dealing drugs, dealing the good shit.
"I'm into distribution, I'm like Atlantic, I got the Mother Fuckers flyin' cross the Atlantic!" - Rick Ross
Plural form of the Urban Dictionary word "Distribute."
Distribution of course referring to the act of providing more than one lady friend with the "goods" in close chronologic succession, therefore supplying a volume of distribution worth being proud of.
Dude 1: "So what did you do this weekend mayne?"
Dude 2: "Aww shiznit man, I banged 3 girls on Friday night, 2 on Saturday, and then 1 more on Sunday. I'm telling you, distribution levels were high!"