a party in which a good amount of women of any age can get together and discuss various sandwich making methods in order to keep their boyfriends and/or husbands calm and relaxed.
Bob: Hey man what are you doin tonight? Wanna chill and play some call of duty online?

Ted: Oh sure man.. I just have to pick up my girlfriend from her sandwich party..it's about that time you know..
by Kitchen B. Itch May 7, 2010
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A pseudonym for an orgy.
Kyle: Ask Joey if he wants to have a sandwich party after school.
Caleb: Hey Joey! Want to have a sandwich party after school?
Joey: Oh yeah!
by VA1KYR13 January 25, 2012
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A sandwich party is a party where a large number of people thrust their bums toward a central figure "Sandwiching" them in horror and butts. This is illegal in most states, and you may be arrested if you are underage; odds of arrest increase with absence of clothing, as do fines.
we starting throwing our butts around, and then it turned into a total sandwich party. Four of us were arrested.
by Nildro February 13, 2010
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When you go to a party full of ridiculously hung dudes who then procede to stack their units together like the game Jenga. Then add a nice piece of iceberg lettuce, vine rippened tomato, and a few slices of aged Vermount Cheddar. You have the option of having a SPS on whole wheat, rye, or white. It can also be served in panini form (see Peni Panini).
Ally said she was really hungry when she arrived to our party, but she then discovered there was only chips and dip, and four lokos. I told Roger to go into the kitchen and grab our extensive selection of bread and condiments so we could offer her a delicious sausage party sandwich.
by PMOses November 9, 2010
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