humour deficit 

comedic bankruptcy,inability to either experience or create anything amusing

HD sufferer - you can say that again
normal person - oh can I - repeats what he has just said
HD sufferer - no response
normal person- i see you are suffering a humour deficit problem
HD sufferer- excuse me i do not understand

humour deficit by Joel Plews November 14, 2007

self-deficating humor 

When you laugh so hard you shit yourself.

John's self-deficating humor was so potent he cleared the room.

self-deficating humor by Skidmarkers March 30, 2016