clear slick

pre-cum - the fluid that leaks from a penis after excitation but before ejaculation.

In the short story "Brokeback Mountain", Ennis "got to his knees, unbuckled his belt, shoved his pants down, hauled Jack onto all fours and, with the help of the clear slick and a little spit, entered him"

by ChicagoMo December 21, 2005