stairway in a grandfather clock 

A total upset. One of the biggest surprises you've seen in a long time. Like discovering Ma'am and George had a secret passage to upstairs for Webster, hidden away inside a faux grandfather clock.

"Wait a second. So you're telling me Ivy is a dude???"

"I slid off her pants and...fuck. I think I'm going to be sick again."

"She didn't have a bulge or anything?"

"Nope. Like a fucking stairway in a grandfather clock...ugh...I'm going to hurl again."

stairway in a grandfather clock by pH Balance January 31, 2008

Mowing My Grandfather's Lawn 

1) Trimming the gray hair out of your pubic hair.

2) Landscaping your pubic region, focusing on off colored hair.

"What are you doing tonight?"

"Probably gonna be Mowing My Grandfather's Lawn, it's getting pretty thick."

Mowing My Grandfather's Lawn by FDPatton July 13, 2012

The Ole Grandfather Cock 

sex move used by a male to pleasure two females at the same time. have the two females face away from you, one in the front and one in the back. place a strap on dildo backwards so that it is facing the girl behind you and also erect the penis towards the front girl. then rock from back to forward once every second.

when one finds themselves in the middle of a threesome and out of ideas, it would be wise to wip out The Ole Grandfather Cock.

The Ole Grandfather Cock by DJCondor July 10, 2012

teach your grandfather to fuck 

to try to teach somebody something that he knows far better than you.

He knows how to write good English. And that is too far better that you. Do not teach your grandfather to fuck.

teach your grandfather to fuck by uttam maharjan August 17, 2010

Argentinian Grandfather 

Awesome guy, he lives near Buenos Aires and speaks Spanish with a central European accent. His closet is full of brown suits. He used to be an electric repairman in the 40s. His favorite drink is Fanta and his name is "Heinz von Schrettenberg"

My Argentinian Grandfather from Buenos Aires just called and said that Fanta is the "superior beverage"

Argentinian Grandfather by IntergalactalEnergy July 14, 2023

great-great-grandfather 

Great-grandparent's father.

My great-great-grandfather is a good person.

great-great-grandfather by Mr. Jacov November 23, 2019

The Grandfather Clock 

When a male of over 65 years old swings his cock back and forth over a young woman's face until he cums. Which is almost always 12:00.

Hey did you hear he gave her the Grandfather Clock?
What time was it when he came?
12

The Grandfather Clock by BIG 80085 March 9, 2010