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1.
A common term synonymous with the intestine being a straight path where (brown) faeces is kept, and thus it is called the "'chocolate' freeway"
Jack inserted his cock into Peters arse for a rough ride down the chocolate freeway.
by Ross February 10, 2002
 
2.
The bowel. Specifically with reference to sodomy.
A homosexual enjoys a ride down the "chocolate freeway".
by Champ February 10, 2002
 
3.
see: rectum
Tim Peters enjoys being analed up the chocolate freeway
by David G. Henrich November 01, 2003