It means to have your cock right inside your mothers pussy and your balls clapping off of her cheeks. We all love a bit of that!
James: Yo I was balls deep in your mum

Chad: That’s radical dude, did your balls clap her cheeks?
by balls_deep_in_your_gran69 January 18, 2022
Get the Balls Deep In Your Mum mug.
When a guy ass fucks a chick and his balls slap against her ass cheeks; ass fucking to the hilt
After the Saints won the Super Bowl, Reggie Bush celebrated by Going Balls Deep Butt Good on Kim Kardashian's phat ass!
by MOCO & P-Phat May 28, 2010
Get the Going Balls Deep Butt Good mug.
Stick the pp inside and try as hard to shove the ball with it, and make the hole on your sub/switch wildly wide!
Nickvideos:yuh i’m balls in deep

Lancevideos:😩
by bobthebuilderskidsjr August 30, 2020
Get the balls in deep mug.
When a guy plows a lady’s ass so hard his balls wedge between her ass cheeks.
I was deep balling Carrie so hard my balls were wedged between her ass cheeks.
by Golf19 November 23, 2017
Get the deep balling mug.
Hey Juan did you hear Zach got diagnosed with deep balls
by BruhNumber4 September 2, 2020
Get the deep balls mug.