Grandfather Crumbs 

The residue in a bag of weed that, because of its size, has filtered through the larger buds to the bottom, getting to about the size of a crumb that would be stuck in a grandfather's beard.

Let's roll a joint, I've got a lot of grandfather crumbs.

What the fuck? When he chopped the weed he left me with all the grandfather crumbs. What an asshole!

Grandfather Crumbs by 1234509876 October 26, 2010

grandfather joint 

A grandfather joint is a joint made out of roaches. The grandfather joint is stronger than a normal joint due the marijuana resin accumulated on the roach.

Lets roll a grandfather joint out of all those roaches.

grandfather joint by MattySA July 3, 2006

Grandfather Cock 

Stand naked in the corner of a room with arms extended like the hands of a clock while rocking hips side to side to slap one's balls against his thigh rhythmically with every second

Uncle Lester got drunk again on Thanksgiving and did the grandfather cock in the corner of the living room for hours until my mom finally called the police

Grandfather Cock by jizzlemcgrizzle August 15, 2011

grandfather clock

While mooning someone, the mooner bends over exposing his dick and balls. He then sways back and fourth as to make his dick look like the long pendulum on a grandfather clock

It just started as a casual moon, but then turned into a grandfather clock

grandfather clock by wing ding June 4, 2006

Grandfather-Clock 

When one gets on a table without your pants on, and swing your junk left to right.

I did a Grandfather-Clock to your mom

Grandfather-Clock by FM4k September 7, 2003

Grandfather cock block 

getting cock blocked by an old person.

I was hitting on this fine looking nurse at the old folks home when my grandma told her about me being unemployed.

me: "nice Grandfather cock block g-ma!"

G-ma: "shut up and drink your ovaltine"

Grandfather cock block by silvershamus February 22, 2011

grandfather cock 

When you're trying to shop for some antique grandfather clocks for your paps but then you unfortunately forget the "l" in "grandfather clock" and now you wish you were dead.

Poor Fool: *mistakenly types 'grandfather cock', clicks on 'images'*
*questionable things appear*
Poor Fool: AH DEAR GOD GET THE BLEACH

grandfather cock by Vladdy45 April 26, 2019