Top Definition
Everything that comes with a Grand Slam put into a sandwich instead. They're very popular. You don't get a choice, you must be put down for one. Everyone gets Grand Slamwiches. They're very popular. Two eggs, a sausage, some bacon, some ham, mayonnaise, cheese, and maple spread all inside a sandwich.
Goddammit I want some pancakes!" "I can slip some pancakes inside your Grand Slamwich ;)" "eeeeewwwwww!
by Jadik April 14, 2011
The sexually glorious act of being sandwiched between two greasy men in a Denny's bathroom.
Derrick got a Grand Slamwich this morning and couldn't finish his breakfast afterward.
by IronBeagle May 31, 2016
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