Morning thickness 

Morning thickness: adverb; the state of feeling bloated (thick) before taking a morning dump.

I woke up feeling rather rotund. I had a feeling of morning thickness hoping soon my morning dump would alleviate the discomfort.

Morning thickness by Chett2tees October 21, 2017

morning thickness 

Nocturnal Penile Tumescence, or the uncomfortable feeling of waking up with an erection. The slang was adapted from Morning Sickness.

Hey dude, you got a mad morning thickness there. Cover yourself.

morning thickness by Zandermuel February 7, 2008