Dunderwagon 

One who does not partake in the discussion of innocent childish topics. Aka a fuddy-duddy

Bill- I just took the biggest poop! I'm sending the picture!

Nicole- that's so gross! grow up!

Bill- you are such a dunderwagon!

Dunderwagon by Fire cool man October 6, 2012

sunderwagon 

an alternative word choice to exagerated

Stop bein such a sunderwagon

sunderwagon by borb March 25, 2005