The Finatticz is a Hip-Hop group who hail from the eastside of Los Angeles. They comprise James "Killa F" Dunn, Tyrone "Jayarah The Truth" Revis, Darrel "Nyce" Beason Jr.and Anthony "Ez The Great" Brown.
"Thun Thun" is a term used in the Bay area that refers to a small tablet in the form of the street drug MDM. The hook basically means "take that molly pill."
The song's beat was created by Compton-based rapper and producer Tycuan "Payso B" Williams who is signed to singer Ray J's music label, Knockout Entertainment.
The song was first recorded by the crew in 15 minutes in 2009 and got its first spins at a house party. Killa F recalled to LA Weekly: "I remember we recorded it during the day, and that night we played it for a huge party at my girl O Titty's house. Everyone told us to turn it up!"
The tune began building organically then a remix featuring Tyga was dropped in February 2012. Soon after, Payso B played it for Ray J, who brought the track to the attention of Alan Grunblatt, who is the President of eOne Music. The label signed The Finatticz to a single deal, with an album option.