I consider the previously posted M.I.A. track "Paper Planes" a dub because the music from The Clash's "Straight to Hell" is played constantly throughout the track. The new song is dubbed over the original music (with some awesome sound effects added)..
I consider this new song from T.I. to contain a sample from M.I.A. The line "No one on the corner has swagga like us" is from "Paper Planes". Although it is a key component to the song (the best part actually), it is not played constantly throughout the whole song, only sampled here and there...But what do I know? I am a nub!