Knockin nuts 

To have gay sex

Yo that's who I saw knockin nuts with tyrone last night

Knockin nuts by Harry bawl segs May 18, 2021

Knockin' nuts 

The slapping of the scrotem on ones inner thighs.

Do you have a bag case of knockin' nuts?

Knockin' nuts by Chris&Annee February 17, 2021

knockin' nuts 

To bump into another man's testicles with one's own testicles, whether intentionally or not, when one is double-penetrating a woman with another man.

The idea of a threesome intrigues me, but the chance of knockin' nuts with another dude turns me off.

knockin' nuts by xray233 August 13, 2007

knockin' nuts 

When a man who has testicles, swings his scrotum sac from left to right in a fit of joy.

Chaz was knockin' nuts when Beyonka agreed to suck his twinkie-cream.

knockin' nuts by Jerome August 11, 2006