S.L.P.D. stands for 'Sweet Lincoln
Park Dude', which refers to type of male you
may commonly find in the famous upscale neighborhood of Lincoln Park in
Chicago,
IL. They are usually found wearing collared shirts, North Face apparrel, or designer t-shirts. SLPDs are also usually found in large groups at overpopulated bars/clubs drinking Heineken or overpriced liquor. They are always judging themselves (and others) on where they are, how they look, or how much sexual activity they can engage in.