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1.
ECP
Evil Clown Porn - A usual category in JokerxHarley fan fiction.
Aww the Joker was really fluffy to Harley in this ECP.
by beccaztr0n August 10, 2008
 
2.
ECP
ECP = Extra Cheese Powder, commonly referring to the silly add-ons a company tries to sell to companies along with a product or service. These value add services really don't exist, but you signed the contract so you are ready to reap the benefits. These ECP add ons are referred to in the sales world as processing fees, management fees, handling fees. You get the point, the stuff that is never explained to anyone ever when asked what you are paying for in addition to the actual product or service.
Here I am thinking all of this ECP was the reason why I signed up for services with Company XYZ, but it turns out they have the same exact service at Company ABC!!!!! Damn you ECP!!!!!!!!!!!!!!!!!!!!!!!!!
by ChiOn November 25, 2013
 
3.
Extra Credit Points
Student A: Mrs. Kline can we get some extra credit for showing up today?

Student B: Yeah Mrs. K toss us some ECPs
by MCKisenwether March 31, 2010
 
4.
ECP
East Compton Piru - Blood Gang in Compton, California
by VAKI5 August 18, 2003