The ejaculatory matter (Semen) released by a masturbating male of any age.
Can be used as a noun or verb.
1. I just got whack on my pants.
2. I was whacking in my room when my roommate burst in with a polaroid camera.
3. I added my whack to your cream of mushroom soup.
4. You didn't provide adequate amounts of whack for our sperm bank.
5. Your whack is lazy.
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