Samitis
The tendency of a person to kill every funny joke said in the presence of that person. Then they will try to laugh about it and pretend they did it on purpose, but they really didnt.

Known Cures: 
1. Putting a bullet in their skull
2. Telling them to shut the FUCK up
3. Killing yourself so you dont have to hear their pathetic attempts at being funny
"what did u do last night?"-person
"your mom! hahahahaa"-person afflicted with Samitis