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When a large person lays out in the sun or uses a tanning bed to become tan.
My fat sister went to the beach without sunscreen and now she looks like a roasted marshmallow. The girls at the tanning salon were roasting a marshmallow all day in the winter.
by tsintao June 03, 2009
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When you know a girl is allergic to something and you put it in her vagina anyway.
I knew she was allergic to Big Red, but I stuck a piece of it in her and I was roasting a marshmallow.
by Marsmallow roaster November 28, 2006
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Roasting a marshmallow
Nobody likes telling Cindy how to do her job. "Why's Dan crying in his office?"
"I saw him roasting a marshmallow earlier and now he feels like a mushy pile of donkey shit."
"Cindy sucks."
"Ooo, burn."
via giphy
by ScryBaby June 13, 2017
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