A whack and pack occurs when your two lesbian friends want a baby. They then invite you over to their house and let you watch and massage your one-eyed snake while they go at it. Then, when you jizz, one of the lesbians takes the fresh cum and packs it into the other's pussy, thus allowing for propagation of the lesbian herd.
Tim: Yo, bro, I heard you went over to Tina and Jen's house last night? You have a threesome?

Jim: Nah, they're both lesbians. They wanted a baby, and so I was there for the whack and pack.

Tim: Still pretty hot, though. So long as they don't hit you up for the child support.
by ADM_Metric April 14, 2015
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