The regrowth hair that needs shaved in the pubic region, or The few pubic hairs that need trimmed that sneak out of a bikini bottom. The lighter version of a Thighbrow.
Candice was avoiding going swimming with her friends as she had a bad case of crotch spiders, even though she had shaved 3 days ago.
When a semi-"excited" male person's crotch looks like a curled up dead spider.
Janice: "Did you see Jerome's spider crotch today?!"
John: "What on earth is a spider crotch"
Janice *makes a fist* "His crotch looked like a dead spider!"
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.