12. “Your mother mates with reindeer!”- Finland

Do not picture this phrase in your head. It is not pretty.

commons.wikimedia.org

In Finland, this is the ultimate “Yo Momma” joke. It does not get more insulting or gross than this. Seriously, try this joke next time you are having words with someone you don’t like. To be honest, it probably won’t go over well.

imgflip.com