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2.
A British colloquialism designating the male sex organ.
Dude, Carol wants some of that double penetration action, so let me know when you and the old horse fat are around.
by Jungle VIP November 22, 2008
 
1.
A lawyer named Patrick Smith infamously invited one of his friends to bring his "old horse fat" over to have a three-way with his girlfriend. The email was forwarded all over.

Source: http://www.cracked.com/article_16690_p2.html
"Dude, "Carol" (not her real name) wants some of that double penetration action, so let me know when you and the old horse fat are around."
by patricksmith January 25, 2009
 
3.
British slang for "dick" or "penis," most popularly used in a work email written by an international law firm lawyer Patrick Smith (now fired).
Smith in email: "Dude, 'Carol' (not her real name) wants some of that double penetration action, so let me know when you and the old horse fat are around."
by AT Hill October 14, 2008
 
4.
Penis in British English
Yo William Carol wants some of that double penetration, so bring that old horse fat and lets do this.
by El pene de muerte October 14, 2008