Marshmellowing 

Using the stickiness of marshmellows to jerk off.

Damn Zach, I was gonna make smores! But now I can't, because you have been marshmellowing!

Marshmellowing by noo_username July 14, 2015

Marshmellowing 

Hitting it with a floppy

"All outta Viagra so I guess I'll be Marshmellowing it tonight"

Marshmellowing by ThatGuyFloppyDick April 23, 2018

Marshmellowing 

The act of "Marshmellowing"
Marshmellow - Marshmellowed - Marshmellowing

When a guy Gropes or Licks a girl's Ass or Boobs, or in fiction, Tails and Wings.
Tails and Wings are seen as "Erogenous zones" in fiction, meaning they are incredibly sensitive

the term "Marshmellowing someone" first had the definition of "Accidental Sex" or even "Unknown sex", it Originated in an anime called "To Love-Ru Darkness" where the Main Character was asleep, but was groping the girl's Tail, Boobs and ass, and went on to lick her tail.
The reason why its called "Marshmellowing" is because this whole time, the Main Character was Dreaming about marshmellows, how "soft & yummy" they were, of course, this was actually the girl's soft boobs, and presumably "yummy" tail.
Note: The girl was awake and enjoying herself, basically using him as a sex toy since he doesn't have the Courage to do sexual acts if awake

Sister: Damn that Rito, he's such a stupid Brother...
Father: What did he do now?
Sister: i was going to wake him up, only to find him Marshmellowing my classmate! Why was she even in his bed?

Marshmellowing by Otaku Muffin July 26, 2020

Late night marshmellowing 

Taking a males genitials and shoving them into a cup full of gonerea puss then putting it in the vagina

Let’s do some late night marshmellowing Karen

Late night marshmellowing by Givemeyoucock February 12, 2019

late night marshmellowing 

Taking a males genitals and dipping them in gohnera puss then forcing your penis in a vagina and making a foamy white marshmellowy mixture but all has to be done between 10 pm-3 am

“Common Karen lets do some late night marshmellowing”

late night marshmellowing by Givemeyoucock February 12, 2019

Marshmallowing 

When you cannot get an erection but shove your cock inside the vagina or anus any way to have sex.

I was so drunk I was just marshmallowing her.

Marshmallowing by Taverna scotiatoastie January 7, 2016

Marshmallowing 

The sexual act of shoving marshmallows into your ladies mouth with your free hand, while you hitting it from behind.

Jasper said when he was having relations with his lady last night he was marshmallowing her, His top score was 15 from what he told me.

Marshmallowing by Tank92y June 5, 2018