Lampshade

A person who is highly stupid, perverted, sexy, ugly, smart, annoying, smelly and really anything you can think of.

To describe the reason for calling someone "lampshade" is almost impossible since it covers all aspects of what a person might be, except if the person is depressed, then he is a lamp from IKEA

I just want to jizz on her tits and tell her mum about it.

Duuude, your such a lampshade