meaning: used to indicate a bad/rubbish item, idea, piece of clothing, car, hairstyle, event... ect
coined in a south london school, where it was originally used to diss a boy called Shea (pronounced "shay") due to his very bad shoes. The original phrase was used in conjunction with his name in a distorted way:
Shea Shoewz, pronounced She-aa-sho-ow-wzz
after which, it became widespread as a general diss for any bad clothing, hairstyle, event (such as getting told off by teachers), or any other bad/rubbish physical object
2) used as a diss when you see something worth cussin
If someone has done something stupid, or has a crap peice of clothing (especially shoes), you can say "Shoewz"