So I'm sure that this was meant to be 'funny', even in Singapore:
Sec 4 student Ian Yap, 16, dressed as a physicist and won the prize for 'Most Nerdy' costume.
He said proudly: 'In order to win a prize for being nerdy, you can't just dress as a nerd! You need to truly understand the ways of the nerd.'
I guess in the scheme of things, this really is a non-issue. But truly, it is also a reflection of the fact that many people simply do not encounter physicists, much less how they work and what they do, that often or at all. So the image of a "nerd" is certainly ingrained in people's mind, especially when it is being re-enforced by popular media, movies, and TV shows.
So are there physicists that actually fit into such nerdy stereotypes? Of course there are, and there are nerdy people in political science, sociology, psychology, music, etc.. etc.. as well! But one would be surprise to see just how "un-nerdy" physicists as a group are. I mean, George Bush looks downright nerdy when you put him next to Lisa Randall! Well, OK, so that wasn't such a fair comparison, but you get the point! :)