gism

Definitions

Widespread US and UK slang for semen. Its usage, common a generation ago, is fading, being replaced with come or cum. See semen for synonyms.
Also spelled: chism; gissom; gisum; gizzum; jessom; jisem; jism; jissom; jiz; jizz; jizzom; jizzum.
Etymology: Believed by some to derive from the Latin jacere , meaning throw; others see a distortion of jetsom, ballast thrown overboard from a ship.

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(Abbreviation) Geographic Information Standards Manager