There are a$$holes everywhere in life. Grow some thick skin.
It is a common concept of placing the suffix -er to a noun or verb suggesting that the word is referring to a person.
This is common internet english so its not a big deal.
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not sure if serious or just joking… but it sure is awkward. 
there are assholes everywhere… we all know that. but even assholes have better argument/joke than that. maybe grow some sense of humor or brain first mate. serious advice.