When you have to poop so badly that your rectum feels hard. It is often harder to get all the poop out when you go since it is dense and very hard.
"I need to poop so bad. I have an erectum."
by spidurmonkie September 09, 2012
2 more definitions
Why do i pronounce Rectum as Erectum?
by Your Best Idiot April 01, 2010
this word is pretty self explanitory
what the hell is an erectum?
by funkblaster4000 July 20, 2006