A spoonerism of "smart feller", a humorous and frequently derogatory term used to describe someone who demonstrates intelligence (or a reasonable facsimile) in a conversation. Can be applied to males or females. First heard in the early 1990s. Identical to fart smucker
In conversation, it is sometimes followed by the correct pronunciation for humorous effect.
So THAT's how calculus works. You sure are a fart smeller. I mean smart feller.
To dress up in a typically metrosexual fashion, go out, and get drunk whilst attempting to meet women. This is different from typical metrosexual and/or male behaviour in that it occurs much more often than is considered "normal." In other words: Nightly.
This term is named after an irc entity who, in his normal channel, has become invariably associated with this activity.
"So, you going to nelluk this week, or just lay low?"