Young Thug was trying to tell you he's a thug with his rap name. You probably didn't believe him because of the dresses.

DC Young Fly went to school with Thugger in Atlanta and he can confirm the "Thug" is no cap.

According to Young Fly, the artist formally known as Jeffery Lamar Williams was kicked out of their school in eighth grade because he hit their teacher in the mouth.

"Man you know what, I'll never forget, we was on team A at Luther Jesse Price middle school," explains Young Fly. "I'm trying to tell you Thug grew up in a real rough-ass neighborhood called Jonesboro South... I forgot, but something happened with the teacher. He said something to Thug. And you know, Thug Goddamn--You know Thug, I'ma be 100. Thug come from the slums. I'm talking 'bout like, the dirt. To see him handle his business, got mansions and shit. N***a I salute it. You feel me. I know where the f*ck he come from. 

But yeah in eighth grade ... the teacher said something to Thug, I think grabbed him.  You know, as a child, you scared. So he popped his ass. That n*gga walked out the room, the teacher walked out the room. That was the last time you saw that n*gga.  And Thug got kicked out of middle school for punching the teacher in the face."

Jump to the 44-minute mark hear Young Fly talk about Thug.