Top Definition
A nickname for someone who is retarded, handicapped, or something that is so lame that you feel jipped/cheated/pwned.
1. You see that spicy tuna sushi? That really boring, not-yummy, lame sushi with just rice and a little slab of tuna? The roll that the sushi tomo people gave us for free and then charged us for? It is so gempi.
2. Look at that Gempi fool, he never does anything right.
by Master Gemp November 30, 2011

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