Name of the song with the lyrics "shorty is a killa/killer..."?

I heard a song on the radio and its very upbeat, and i have no clue waht its called and the only part i rememebr is "shorty is a killa..." and that repeats a few times... it talks about how she wants him but hes a "killa" (not literally but more figurativly) and i really really wanna know that name... or more parts of the lyrics so i can search it on google.