When you put your finger up a butt during sex/foreplay, and you go a little too deep, resulting in a bit of poo on your knuckle.
Dude1: how'd it go with that chick last night?
Dude2: not bad. She wanted me to finger blast her butthole, so I did, but I got a little over zealous and ended up with a fudge knuckle.
Dude1: oh man. that's fucked up!
Dude2: yeah, but she ended up riding me all night so....
When you have to shit and can't find a bath room on the cruise ship so you do your business overboard.
I had to take a crap but couldn't find the bath room on the ship so I just did fudge overboard.
When a girl is sucking the diarrhea of your dick
" Amanda was getting freaky last night, I heard she was a fudge gobbler."
Wet fudge is when you are eating a girls ass and she poops and you bite it. Making it run down your chin like a wet piece of fudge.
“Bro, last night Debbie made wet fudge. It was fire”
To royally fuck up any situation for everyone involved
Guy1: "You Fudged The Bowl, its your responsibility to clean it."
Guy2: "i guess your right, i wont Fudge The Bowl again"
To be pegged whilst still wearing your pants (usually with no time to remove them)
Phil and Sylvia were feeling horny but before he was even ready, Sylvia had the dildo strapped on. He looked in horror as she strode towards him purposefully because he’d had no time to remove his pants. Sylvia steamed in and gave him a good fudge pegging. He was left totally fudge pegged.