Named after the delicious dessert from the Squealing Pig in Boston, MA, this deviant sex act requires two people who engage in any form of sexual intercourse in a tanning bed, and then proceed to defecate in said tanning bed.
Yo dawg, imma call up Shirley and we are gunna drop sick mars bar toasties at Campus Tan.
by Josh Lundgren April 10, 2006
6 Words related to Mars Bar Toastie

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