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1.
A sexual act in which one deficates onto the chest of thier partner. So named for it's resemblance in color to Belgian chocolate and the body heat of the "depositor".
Man, that girl was a freak! She wanted me to give her a Dirty Sanchez and a Belgian Steamer!
by Zkilla January 30, 2006
 
2.
The act of defecating on a womans face while she is sleeping, and then adding whipped cream, hot fudge, and a cherry on top.
Jack gave Jill the messiest Belgian Steamer I have ever seen.
by sunday lover May 11, 2006