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1.
ERP
ERP stands for Erotic Role-Play. Role-Play in this definition refers to the typing RP done in video games, chatrooms and forums.

ERP is a role-play with little plot besides the quick sex scene between characters. There is no consequence and no long term story behind it.

ERP is basically RP that is rated X.

The term is often confused with MRP, but it is very different.
Would you like to do an ERP? I'm really in the mood.
by Villanite December 28, 2007
 
2.
ERP
The worst purchase tracking software ever made. It never really works. When you think it does......you've fucked something up.
I'm gonna make a software that should help make tracking purchases but in reality will cause people to not be able to finish their regular work. It shall be called ERP!
by user458237 November 18, 2010
 
3.
Erp
To become sick.
That awful smell just makes me want to erp!
by Ette July 11, 2003
 
4.
Erp
An exclamation used most commonly with a "?" to signify confusion.
Dude#1: Hey man, I went to a farm and spanked every pig there!
Dude#2: Erp?
by Alexei March 19, 2003
 
5.
erp
score * badonkadonk ^ 2
that was an erping good time
by kringle December 24, 2002
 
6.
ERP
Except Ron Paul
All politicians suck (ERP).
by RonPaul420 January 18, 2012
 
7.
ERP
Acronym of Extra Recticular Probing, meaning sexual intercourse of the anal variety.
I'd love to give her/him some ERP!
by Mat Hayward May 26, 2006