A bogdon is a self-aggrandizing, arrogant, condescending douche bag (usually female) who likes to use their false sense of intellectual prowess to compensate for their horrible self esteem. This can be seen most often in the form of correcting grammatical errors of others on the internet. It can also come out in the form of constantly having a shitty remark to make at the intelligence of someone else, even though this bogdon is actually a fucking idiot as well.
"Hey, me and Bill are going to get a drink"
bogdon- "Actually, I think you meant 'Bill and I are going to get a drink"
"Wow, what a fucking bogdon."