An Erectum is when the man inserts his penis into his partner's ass before it is erect, and then it becomes erect while sitting inside of their partner's ass.
"Did you hook up with that chick last night?"
"Yeah, we had an Erectum."
"...the fuck is an Erectum...?"
"Yeah, we had an Erectum."
"...the fuck is an Erectum...?"
by CJSummer August 6, 2015

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 9, 2012

what the hell is an erectum?
by funkblaster4000 July 21, 2006

by Your Best Idiot April 1, 2010

by Khimler May 23, 2020

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by Kim_size January 31, 2017
