Top Definition
Following male ejaculation and subsequent clean up, it is when the male then takes the residue at the tip of his penis and while still semi-erect stabs or "stamps" the female in the forehead leaving behind the remaining semen.
1. "Yo man after I banged Jennifer I made sure to give her a proper Jimmy Stamp."

2. "My girlfriend was not very happy with me after I attempted the Jimmy Stamp."

3. "Jimmy Stamping is difficult to achieve with a girl you respect."
by Da Captain December 03, 2013

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