Defecation deficit
To not be able to take a shit; to be constipated.
Sorry, that was my digestion. I'm in the middle of a defecation deficit.
Defecate deficit
Constipated or bunged up.
'Dude, this defecate deficit is still going strong- I've eaten a kilo of prunes and still no joy. The poor toilet is going to look like Hiroshima when it does finally come. Desperate times require desperate measures so I'm thinking I probably need to gouge it out with a long narrow implement. That reminds me, you should buy a new toothbrush..'