Some of my personal favorites/creations?
Crapdoggy: You use this expression when something goes foul.
Poo on a stick: Most typically utilized upon feeling unhealthy.
-ify, -ariffic, -anator, -iosity: I add these, and others, to the ends of words/names to make them seem more pertinent.
Example: Shaylariffic, Jonanator
This cookie is could totally fatify me.
You are so fantastariffic.
This cookie is total deliciosity.
*My mother uses the phrase,"Oh horsefeathers," all. the. time.