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1.
Extreme desire/lust for the male genitalia.

A strong desire to perform oral sex on a male.
Natasha's cocklust made her very good at felatio
by DB January 13, 2005
 
2.
noun, to have lust for the cock, or penis.

often used when talking about slutty girls who have all kinds of casual sex.
Some girls have even earned the title as a shameful nickname.
Alycia has mad cock lust for, like, everyone.

Get off my jock, Cock Lust!
by Jaynik June 12, 2008