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1.
The penis of a male with a name that begins with the letter "J"
Jeff says "J-cock was very happy last night, he had sex for the first time in a while" or "My J-cock is 7 inches long" or "yeah man i used J-cock on her all night"
by schaeff daddy April 17, 2009
40 11
 
2.
A combination of cocking out and jazzin. When you're just chillin but also leading with the cock.
Last night a Shoko 'Jamin' was being a j-cock, just chill dancin.
by Ace 2 da Mace June 18, 2008
4 6
 
3.
Slang for the male genitalia comprised of German, Irish and African American blood
All women, no matter what they say in church, desire the j-cock.
by CherBear December 09, 2004
12 27