"Catfishing" -- it's a term for someone who creates a fake online identity in order to trick someone else.

It's especially been a hot topic since it was revealed the girlfriend of a star Notre Dame football player never existed.

The experts say it happens more than you think and victims say it is flat-out embarrassing.

"Pretty blond girl? Oh, pretty blond girls are the devil," Tulsan Derek Kastner said.

You know him simply as Derek, co-host of The Morning Edge on 104.5 FM.

Kastner said he's been the victim of a catfish.

"At the time we didn't know what it was...she was a girl, she had pictures, she would text pictures, but I could never meet her," Kastner said.

He said it was 2003 and he was working radio in Arkansas at the time when this woman, who calls herself Jenny Jam, friended him through Myspace.

"Very attractive, very good voice on the phone...stuff guys fall for," Kastner said.

Kastner claims he kept trying to meet the girl, but she always had something come up, one time it was the hives, another time it was "daddy-issues."

They never met and now 10 years later, he said he found her on Facebook.

Reporter: And you don't know who that actual picture is?

Kastner: Nope.

Reporter: And you don't know who's behind Jenny Jam?

Kastner: Nope.

So what makes him think she's a fraud?

According to Kastner, the pictures are the same he said she sent him in 2003.

"Same picture, same picture, nothing new," Kastner said.

Kastner is telling his story because of Manti Te'o. The star Notre Dame linebacker's girlfriend was reported to have died in September, except now it's been revealed that she never existed and it's unclear if Te'o was in on the hoax.

The street word for it is "Catfish," named after a 2010 documentary. The filmmaker also has a current series on MTV, which aims to bust people in the act of catfishing.

"They're a con artist essentially," social media strategist Allison Broyles said.

Broyles said it's easy for someone to create a fake online identity. They steal pictures from other sites and do whatever they can to get as close to others as possible.

"They could be looking to pull a cool trick or a prank, or maybe they get something else out of it," Broyles said. "They're probably not going to ask you for money, but they want to know about your personal life."

Kastner hopes others learn from his story and said to beware of someone who refuses to meet in person.

"If something always comes up (where they can't meet in person), something's always up," Kastner said. "If they keep changing plans, then that's just not normal life."

We sent a message to Jenny Jam on Facebook to get her side of the story but she hasn't responded.