The "Chicken Sandwich" is when two great things meet eachother at the peak of mental and physical pleasure. A man is bending a supremely gorgeous woman, doggystyle of course, and he realizes that he is hungry. This is where the chicken sandwich comes into play. While holding the chick's ass in one hand the man simultaneously eats the chicken sandwich with his right hand, thus bringing together two joys that every man craves.
"Dude, last night I went to Wendy's and i ended up chicken sandwiching the hell out of this tight asian chick."