Def P (real name Pascal Griffioen) is a rapper from the Netherlands. He's best known as the front man of the Amsterdam based hip hop-group Osdorp Posse and is often credited to be the first one to rap in dutch. He has a weekly radio show on Dutch alternative station Kink FM.

In 2001 he collaborated with dutch skaband Beatbusters, which resulted in the album 'Aangenaam', and the #10 hitsingle 'Bubbelbad'.

He recorded three solo albums: the cryptic 'Cryptokilostijl' (1999), the sciencefiction inspired 'Het ware aardverhaal?' (2001) and the very personal and philosofical 'Pascal Rascal' (2007).