"The only thing I can classify it as is dangerous," said Lt. Charles Balderstone with the Pasco Sheriff's Office.
It's mentioned in rap songs.
Madonna glamorized it on stage, asking "how many people in this crowd have seen Molly?"
And people are even posting videos on YouTube showing it's disturbing effects.
Experts say Molly is a pure form of MDMA or Ecstasy, that's making it's way from places like Los Angeles and Miami to right here in Tampa Bay.
"Over the past few months we've made numerous large seizures of this stuff," said Balderstone.
The drug is often used by teens and those in their early 20's at parties and clubs. And it seems to be carrying with it the reputation that it's safe to use.
But Chrissie Parris with the Alliance for Substance Abuse Prevention in Pasco County says that's false hype.
"We know that it has some serious effects on the brain, causing potential for high blood pressure, dehydration, and people feel that euphoric effect of speed that they can go on for a long time."
The drug is usually in a white power form and then put in gel-caps, where it's hard to know what's really inside.
"If that dose amount happens to be too big, then those effects could be catastrophic," said Balderstone.
"And we've brought it up at all of our presentations in the community to make sure that people are aware of it and that it is called Molly, and it's not your child's friend named Molly," said Parris.
It's illegal to sell it or buy it. Molly is in the same legal category as heroin and LSD, and experts say no matter what you hear about it, the danger is real.
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A 4-year-old Pasco County boy is dead. According to family members, doctors suspect he contracted bacterial meningitis, He started showing symptoms Saturday night.