Dirty Surfboard 

When you are at a party/large gathering, and you have to drop a poopie, so you proceed to turn on the bathtub/shower at said party, and proceed to take large poopie/poopies in the tub. Wait a few hours for the bathroom to flood, and vuala! A dirty surfboard!

"Yo bro I just rode the waves on that dirty surfboard you made in the bathroom. You pooed a fat one out."

Dirty Surfboard by JuicyJoints6969 April 17, 2017

Amish Surfboard

A flat chested 2nd cousin, particularly one that you have titty fucked, or have interest in titty-fucking.

Dude, I totally rode a Amish Surfboard at my family reunion last weekend.

Amish Surfboard by Buford Turnipseed June 27, 2019

Surfbort 

Heard most commonly in the Beyonce song "Drunk in Love", Surfbort is a sexual position where a male lays in the tub with his knees bent. The woman straddles him with her back towards him so she can ride his dick by holding onto his thighs, much like holding onto a surfboard and bobbing through the ocean.

"Fill the tub up half way and ride it with my surfbort."

Surfbort by xxx-tk2 May 6, 2014

surfboredism 

To much time on social networks.

What are you doing?I have surfboredism!

surfboredism by Ouch Sisselpud May 10, 2011

Surfboart 

How Beyonce says "Surfboard" in her song Drunk in Love.

i've been grindin in the cluh and ridin mah surfboart

Surfboart by big man doo doo April 24, 2014

SurfBoarding 

Doing a chick doggy style, then both laying down flat, male on top of her while continuing to stroke. Not unlike riding a surrfboard in a face down horizontal position.

I was strokin that girl from behind for so long I got tired and had to finish by surfboarding her.

I like surfboarding so I can mash my nuts between her thighs while I'm fucking her in the ass.

SurfBoarding by DOTB May 6, 2009

Surfbort 

From Beyonce's 'Drunk in Love' song. She pronounces 'surfboard' as 'surfbort' and people take humor from this. It is a Beyonce-ism and sounds funny so has been adopted by the Beyhive as a joke/humorous word. Has been made into t-shirts by various Beyonce fans.

"Then I fill the tub up halfway then ride it with my surfbort
surfbort, surfbort"

"Beyonce has redefined the word surfboard to surfbort"

"I'm riding my surfbort"

Surfbort by Aphix2005 January 13, 2014