Poop Items are special sort of items you can win on Slot Machine, but they are completely useless and therefore you can't take them but only sell for very low price. You get these by winning three poop icons in a row. Don't hope for something special, these items are completely useless. There aren't any weapons like Dooty launcher in SFH 2. It is also the most common spin on the Slot Machine, so expect to see it often.