"lulz" is derived from the commonly used slang "lol". It is often used by those who try to differentiate themselves from other individuals and often have low self esteem. The "z" is supplemented to demonstrate just how "lul" the situation is, but is seen by others as ludicrous and redundant.
by Jay Lay April 14, 2011
Pree is just a slang word for pretty. Not to be used instead of pretty in the case of saying, looking good.
by Jay Lay June 21, 2011