When your first gray hairs are in a small patch right on the front of your head. Usually located more to one side or the other. If you have long hair, especially darker hair, it resembles the stripe down a skunk's tail.

When you eat dirt for the first time and leave your family to build a shack in the woods

When a woman has shaved all her pubic hair, except for a carefully groomed, perfectly centered, thin stripe.

Whilst dumping a 2 foot log in a public toilet, the gently log gets jammed on the bottom of the toilet. The log breaks and on its fall it kisses the underside of the dumpers nut sack.

When you blow your load and leave a line of jizz in someone's hair.

a streak of poop residue down the center of a toilet bowl left by a careless flush walkerthat looks like a (insert poop color) stripe

when a trail of food or substance that looks like cum is dribbled down the front of your shirt in a striped fashion.