When a gigantic piece of crap has been lovingly nurtured and has reached its final level of growth and development. At the end of this stage it's evacuated from the safe, warm environment that is the bowels. Coined in the South Park episode "More Crap".

In real life, the turd trimester can be compared to the status of pulling tongues.

The Nussy, or the “nose pussy”, if you will, was discovered during the corona virus pandemic of 2020. People that had to be tested for Covid-19 had to have their nose swabbed right where the brain connects, which often led to people rolling back their eyes and gagging.

A nose-swab-fetish developed from this, because we, as humans, ruin everything.