A male pursuing a sexual relationship with a female under the false pretense of friendship.
In situations in which the ratio of males to females is high, (e.g. anime/science fiction/comics clubs, sports clubs/organizations, certain school campuses,) suck-punks are known to travel in packs hovering around the only females available.
Since there were 150 males and only 50 females on campus, Doc's girlfriend attracted no less than 5 suck-punks at any given time.
"They're just my friends!"
"No, Cathy. They're not your friends. They're suck-punks."
"There's this git she works with that keeps trying to warm up to her. I might have to whip the little suck-punk's ass."
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.