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3.
When a man has sex with someone, man or woman, with whom he regards only as a thing to have sex with an nothing more, he or she is a receptacle.

A catcher for whom the pitcher holds no emotional signifigance
Homo Joe likes illegal immigrants off the pier...his last receptacle got deported.
by Exilechamp1 April 18, 2004
 
1.
Receptacle "receive back,"

In Zoology
*an organ or structure that receives a secretion, eggs, sperm cells, etc.

Common use
* women that receive secretions, spermatozoa, etc. without requiring a condom.
'left me a voice message. "Next time you use me as a cum receptacle, please..."
by SuraScent April 12, 2007
 
2.
An old word used to describe a sex-only relationship. "Receptacle" was made popular by a handsome young Physician character on the 80s television drama St. Elsewhere. The young Doctor said: "I'm not looking for a relationship, I'm looking for a receptacle." For the era, this was quite shocking. President Reagan was in office at the time.
Modern example: "Dude, I just can't handle a relationship that requires meaningful social interaction. I only need a receptacle to ejaculate my goo into."
by Rook's Buddy May 10, 2010