1. "Deposits" of "man-milk" dat one or more virile dudes make to a hot chick whom they're on intimate terms with, either because she wants a baby, or just because she's horny all da time.
2. Da b**ls**t description dat greedy ministers and televangelists use to label requested money from their already-cash-strapped audience with da implications dat said donors will then "reap bountiful rewards from God", but which said Bible-blabbers then use merely for their own personal gain.
"Seed donations" can also sarcastically refer to either child-support payments dat a guy hasta pay a gal whom he knocked up, or "hush money" dat he hasta give her so dat she won't blab to others about his having had sex with her.