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
by jizzlemcgrizzle August 12, 2011
iy mate, i wazza gonna bye me Pap a grandfather clock but accidentally searched 'Grandfather cock'! help me pls bro
by Ɋㄩ乇乇尺 丂卩卂匚乇 匚ㄖ爪爪ㄩ几丨丂ㄒ☭☭☭ July 24, 2018
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
*questionable things appear*
Poor Fool: AH DEAR GOD GET THE BLEACH
by Vladdy45 April 27, 2019
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"
me: "nice Grandfather cock block g-ma!"
G-ma: "shut up and drink your ovaltine"
by silvershamus February 02, 2011
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.
by DJCondor July 08, 2012
omg grandfather cock butthole penis very interesting .-.
by big daddy poobah June 14, 2017