A Youseff is a creepy paedophile egytian, commonly found in the bushes outside your house wearing nothing but a creepy smile that no-one is really all that comfortable with. Youseff's are known to keep Hit Lists of their enemies and will add you to it for even recoiling in horror at his stench. If confronted by a Youseff, run. Fast. As far away as your legs will take you without breaking off. Even then, crawl, till your hands are bloody stumps. If escaped is not possible, a highly recommended defence is to play the song "Walk Like An Egyptian", this will cause a Youseff to fall into a trance like state of walking like an egytian. Use this time to escape. The reward for killing a Youseff is $5.50 or two Asian sex slaves.
"Ah, what the fuck is that....Its hurting my eyes....ah fuck it's a Youseff, shit, where's my Ipod!?!?"