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."