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The process by which one slowly becomes gayer simply by hanging around gay people. Prolonged exposure can result in the victim becoming bisexual, or even fully transitioning to being gay themselves.

The blending of the words "gay" and "osmosis."
Jack used to be really straight until he started hanging out with his lesbian friend Jill. He's talking about boys a lot now...must be the gaymosis taking hold.
by spicyjimbalaya September 17, 2009
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