A headline grabber is a person who is a HUGE attention seeker. If they are in some kind of trouble, ill, had an argument, or are bored, you'll know about it. And so will everyone else. People that can be legitimately titled "Headline Grabber" are;
1) Those that cut themselves and make sure everyone sees the wounds as they stare melodramatically into the distance
2)Those that think they "might be pregnant" all the time
3) Anyone who goes out wearing PVC trousers or a string vest
4)People who have got "such a headache" every time you speak to them, and the "stupid doctors" can't work it out
5)People who "just can't talk about it- no, don't make me! I can't tell you, it's too horrible"
6) Girls that tell their male friends that their boyfriend is a bastard, and then get them to start on him- only to declare undying love for him a few moments after the drama has subsided
"Ignore Shaz in her stupid PVC trousers and string vest. She thinks she's pregnant again. Fucking headline grabber"
"Look at those emo kids with their trendy arm slashes. Headline grabbers; let's hiss at them!"