A Smogonfag is an insult used to a person who devoutly follows the rules and tiering defined by Smogon, the wide-known "Competitive" Pokemon forums named after the German Koffing.

Always using a predictable strategy, they whine about three recurring Pokemon-related themes:

1) Using entry hazards. In a nutshell, affects most of all Pokemon when they switch out. Moves such as Spikes, Toxic Spikes, Stealth Rock and Sticky Web are one of the worst fears of these wondrous"Meta-Players", even if they carry a "Mighty Special Wall" (AKA Blissey) provided of only 3 supporting moves (Such as Toxic, Soft-Boiled, Protect or the very Stealth Rock.) just like a proof of his trust in this human (i.e failing) system of classify Pokemon by its abilities (i.e tiering) .

2) Using "uber" (above in German) or a "Pokemon that I can't find out a weakness." This can be proved by the often use of the tiering (One of the ways which they classify Pokemon by its supposed battling utility) in which they forbid the "Legendary factor" for making the battle the most realistic possible. In order to preserve the strategist factor, they forbid the Pokemon that don't fit on their standards.

3) Claiming to use favorite Pokemon.

Too long; didn't read: Smoganfags are just a different flavor of sore losers.