Deet is what the little brown people on "Super Mario Brothers" do. They walk left and right and go "Deet, deet, deet!". A little brown person on Super Mario Brothers is referred to as a "goomba". Goomba's are the most common creatures that deet. Deet can also be used in the form of "getting someone", you say "I'll deet ya!".
by GoombaDeet7 November 13, 2011