A cup usually held by bro's at a party. They usually contains some sort of alcohol in it. The cups are almost always red, possibly to hide the fact that they are drinking?
A cup of human or animal shit that you leave near a heat source that is not visable. The cup and odor are a slow brewing present to leave friends and enemies.
The weather is cold today and I have to drop a serious turd. If i leave this shit cup on the radiator under the desk, I bet the entire house will enjoy my stench tommorow.
Protective equipment, most people don't wear them because they restrict movement and are uncomfortable, main use is to stick in you friendsface after worm during a workout
I used to wear an athletic cup for wrestling, but I found out I could do better without it, now I just exercise in it and stick it in my friends faces when it's sweaty.