when a white girl is sucking your meat while stroking her hands on your penis. This looks like white bread, with meat in it, and after the guy comes, theres the mayonnaise. If the guy has an std then it's mustard! There are other variants though. It could be a black girl, in which case the "bread" is pumpernickel, or rye bread. replace whatever kind of bread with the skin color.
1.last night, my old lady made me a dicksandwhich. no homo.

2. when i go to the drive thru at mcdonalds and i get a girl taking my order, i ask for a dicksandwich, and they always ask "what"?
by rcpthenemesis December 30, 2009
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