Def P & Beatbusters is a Dutch music group consisting of rapper Def P of the Amsterdam old-school hip-hop band Osdorp Posse and ska band Beatbusters from the rural Betuwe region of the Netherlands.

Def P started his solo career in 1999 with the album Cryptokilostijl. During a concert at Lowlands he was accompanied by several musicians from Beatbusters and they already discussed whether Dutch rap, ska and reggae could be combined and in September 1999 they performed four concerts in Italy together. They decide to call the combination of the two styles "Skank-hop." Since both groups had their own label (Ramp Records and Boombax Music respectively) it was decided to put the combination at EMI.