John Jonson's definitions
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."
kid 2: "He doesnt really have that big of a penis, he just gave himself a shower gumby."
by John Jonson June 10, 2009
Get the shower gumbymug.