what is this song???

[vocalperk]

I am trying to remember a song I listened to maybe 5 or 6 years ago. I am not sure if it was new at that time, or just new to me. All I can remember is the following:

• female singer
• I think it was rap
• I also think this artist was originally kind of laughed at or not taken seriously because she has a little bit of a low voice?
• the song started out with some beatboxing (human, not a machine)
• the beatboxing went: bom ts kuh ts ts ts bu-kuh ts bom ts kuh ts ts ts bu-kuh
• to get the rhythm of that beat box, each syllable is equally spaced apart and "bu-kuh" is said and spaced together like one syllable
• there may have been some background-y vocals of females at one point that went "wahhhhhh"

This is all I can remember and it is driving me crazy not knowing which song/singer it is. I know those are vague points, but I am hoping the ones about beatboxing (I beatbox so I remember the beat more than the vocals) will ring some bells with someone!

Does anyone know? Thanks in advance if someone hits on it.