Roast a marshmallow 

Slang for smoking a cigarette or joint.
Roast because of the fire you need to light it and marshmallow because of the white paper of the cigarette or joint.

Let's go roast a marshmallow.

Me and Rocky roasted a couple marshmallows last night.

Roast a marshmallow by YungShalom May 17, 2020

Roasted marshmallow 

The result of receiving a non-arousing handjob that results in loss of erection and burnt penial skin.

My cock hurts bad, it’s a damn roasted marshmallow.

Roasted marshmallow by AlabamaBaby January 2, 2019

Roasted Marshmallow 

Before intercourse the man sets his pubes on fire and quickly puts it out with whipped cream, while the partner licks it

James: Dude, I got way too kinky with my girlfriend last night
Tony: Did you guys do the Roasted Marshmallow?
James: Hell yeah

Roasted Marshmallow by Bigger fatty January 29, 2018

roasted marshmallow 

when having a threesome, one girl shits on the other girl's chest while the guy cums on the shit, making it look like a Roasted Marshmallow

"Hey, saphirre lets give Monique one of our famous Roasted Marshmallows"

roasted marshmallow by badonkadonk brothers April 18, 2008

roasting a marshmallow

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.

roasting a marshmallow by tsintao June 3, 2009

Roast Some Marshmallows 

Used when camping in a first person shooter.
to/will kill someone while camping.

"I'm going to camp behind this tree and roast some marshmallows."

Roast Some Marshmallows by Fryt January 5, 2010

roasting a marshmallow

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.

roasting a marshmallow by Marsmallow roaster November 29, 2006