Veins being visible in the eyes. It's a common side affect of marijuana use.

when you're hungover as shit after a spending a night drunk as a skunk

When someone is in a fight and takes a swing that hits on an unaware opponent after time is called.

A bloody ejaculation or cumshot, typically caused by trauma to the testicles such as torsion, surgery, or lighting your crotch on fire an then having someone stomp it out.

While your female companion is on her period, one should pull out just prior to 'Nutting" (See definition for nutting) and 'cum' (See definition for cum) in said companion's mouth.