How can a guy look like a girl what should he wear?

Such a fun question. As a female I am sure I can inspire you. If you really wish to put some effort into it, you will have to buy some hardcore female stuff, if you do not you can subtract from these suggestions. Buy/borrow a bra, if you want the large breast effect buy/borrow a C cup and above, and try to find the one with plushyness, put it on and adjust the straps and everything so it fits well but not too tight so you can fill the cups with newspapers, tissue or cotton or whatever; try to give the material some shape or conceal it well inside the bra so that it is less noticeable to know that you are wearing fake boobs. If you wish you can wear a dress, skirt or skinny jeans or regular female jeans (buy jeans that fit and do not wear them like you just went to the poo-parlour division) if you decide for a skirt/dress you can either shave you legs.. or even better wear some dark-coloured tights (you know.. if you have hairy legs) You can pick any shirt really but make sure it is for a female, even if you go for the goth/emo look it is best to find a shirt that was found in the female section, unless you want the tomboy look, your choice. Same for the shoes, except you do not have to wear high bloody heels if you do not want to break an ankle, you can go for the sneakers thing. Make-up, probably the most important part of the whole thing. If you have a beard, mustache, dead raccoon on your face, or the like, please shave it off. Then, ask a female friend (if any) or your mother (if any) to help you with the make-up, make sure to apply foundation/concealer to minimise pore size (especially for a male since pores tend to be bigger due to the whole facial hair fandango), use eyeliner, mascara (or fake eyelashes), lip-gloss if you prefer rather than lipstick, female perfume. Style your hair however you like, if you have short hair accesorise it, with a bow/ribbon or something. Voila, monsieur! Have fun I hope this helps =]