He's trying to say that the Finnish posted wasn't a "word", when it is
clearly an insult he doesn't want to deal with.

http://www.insultmonger.com/swearing/finnish.htm

Drop down the list and you'll see "Insider Dave" has managed to lie
again.

Paras osa sinusta valui lihavan äitisi sisäreittä pitkin, mail order
bride.