Gambiism
When something is so naturally amusing, without trying to be amusing, but rather the amusement is in the nature of the person itself, that's a Gambiism.
An example of a Gambiism - "when Christmas time comes around, you have to go through the hassle of raping all the presents and buying everything to rape them with... it's a lot of work to get everything raped before you put them under the tree"
"uh... don't you mean wrap?"
"uh... don't you mean wrap?"