Booty Mumbler is slang term for a street thug that is providing mendacious comments.
Secondary definition: An african warlord battle cry that existed in the prehistoric ages
"Quandavious Finglebottom really is a Booty Mumbler. He rumble they earth with them lyin ass comments about his thug shakin abilities."
A Booty Mumbler is slang in the mid-2000's for a thug living in the hood that snitches to their fellow thug crewmembers.
"This homie a real Booty Mumbler breh, he be snitching on me on da opps."