boot fin 

The fin created on one side of your hair/head when you vomit (boot) from drinking too much and then sleep in a pool of it. The fin formation is the result of it drying and creating the ultimate hair spiker.

Man, look at Tim—he's going to have a boot fin in the morning.

Is that hair mousse or a boot fin?

Yesterday I woke up with a boot fin and couldn't remember how I got it.

boot fin by dragon fan July 6, 2006

Nemo-Fin

A bad wingman.

I would have gotten laid, but Steve was being a total Nemo-Fin.

Nemo-Fin by GetItPDick January 16, 2011

mamma fin

one awsome mother fucking mom of a lezbian bisexual tranny named jillian finley, she is a prostitute in camden nj.. mamma fin is in a guy with michael schepis and mamma zig.. they smoke weed all day and kill people.. there gang is the schepis gang.. the gang lkeader may apear to have the pilsbury dough boy on his neck... MAMMA FIN IS THE SHIT I LOVE U<333333333333333333

mamma fin

mamma fin by poop alot in the morning nd pm August 23, 2011

blanket fin 

A fold or bit of blanket forming a "fin" shape

Snuggle Partner #1 "Is that shark in our bed?!"

Snuggle Partner #2 "No, it's just a blanket fin."

Snuggle Partner #1 "Wheww! Close one..."

blanket fin by lil-nugget February 5, 2013

Mud Fin 

Mud fin is when someone passes gas, emitting some fecal matter that gets flattened out between their butt cheeks, poking out of the crack like a shark fin.

Steve could tell that last flatulence gave him a mud fin.

Mud Fin by Lazy Reggie August 4, 2013

salty fin 

When a man sprinkles a pinch of sea salt on the tip of his penis and penetrates the vagina with incredible force.

"Oh bro I'm gonna salty fin this lil ho"

salty fin by dickalmondtits February 2, 2016

Quad Fin 

$20 bill, equivalent to 4 Fins, commonly used in Newfoundland

"How much we getting?"
"Quad Fin."

Quad Fin by atrem October 10, 2020