Earlier today I noticed a comment that had a "lmgtfy" (Let me Google that for you) link in a comment (now deleted).
Such links have been blacklisted on Stack Overflow and Software Engineering mainly because they are condescending and insulting to the OP. See all the questions that include "lmgtfy" on Meta Stack Overflow for more information.
Can we have this added to the Super User blacklist?
As of 15th December 2012 lmgtfy is not blacklisted. Here's the evidence (10k only). However, there are only 5 posts that contain the string and 20 posts that contain it as a URL. So it might not be such a big problem after all.