Top Definition
When a person intentionally plays with his wiener to make it seem like he has a bigger-than-normal penis in the locker showers
kid 1: "Man did you see the size of Richards wang? It was massive!"

kid 2: "He doesnt really have that big of a penis, he just gave himself a shower gumby."
by John Jonson June 10, 2009
5 Words related to shower gumby

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