Top Definition
1. To be broke and lazy enough to believe it is a good idea to market and sell one's semen.

2. Any act of donating sperm, especially into the mouth of a female.
1. Joe never graduated highschool, so he made most of his living spermbankin'.

2. I'm seein' her tomorrow night, and you know I'm gonna be spermbankin'!
by egotrippen May 07, 2007

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