no-time:
If u like non-branded & funky, can try <font color="0077aa">Sungai Wang Plaza</font> in Bukit Bintang. Quite a youngish place but crowded during weekends. Not sure if it'll be quick for you though. If u r like me, like to survey around before buying, then it might take more time, a lot of little shops there, wuahahaha...!!!
Can try to bargain a bit with the smaller shops ppl although they may try to bluff that prices are fixed.
If u don't mind haggling, can go street market at Chinatown. But the quality... hmm, buyer beware! Can also check out the shops in <font color="0077aa">Chinatown</font>, some clothes & shoes are cheap, value buy.
Those are places I used to frequent in the "good old days" when I was a poor student with extremely limited pocket money, hahaha. Nowadays lao liao, prefer going to "family shopping malls" like <font color="0077aa">Mid Valley Megamall</font>, got cinemas, lots of eating places, large supermarkets, a variety of shops & larger car park.