The act of doing some thing to a major extreme.
Dude that test was balls real deep.
Dude he landed it, balls real deep dude, no way.
by Storm VFH January 30, 2008
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1) When you go all the way in, all the way up to your balls.

Can also mean

2) in a lot of trouble/peril , in a lot of danger.
She likes when he goes BMFD: Balls mutha fucking deep nside her and she feels it poke her back.

The other day i got caught in a street brawl and was Balls mutha fucking deep right in the middle of it!
by BRICKESE February 17, 2013
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A 2 ball, 0 strike count (2-0) in baseball
"here's the pitch ... and its outside... and Kyle Seager is now two balls deep"
by Hairy Caray February 4, 2018
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Balls deep means when ur so deep into the pussy that ur balls are in it.
U walk into ur room and u brother is balls deep into ur sister
by Smdlilbich June 30, 2019
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When you are inside a girls vagina balls deep
Oh your balls deep into my vagina 🤤
by SexualSlave February 15, 2019
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when you go so far in you gotta squeeze your scrotal package in too
bro i was balls deep in her (or him) last night”
“wow! did they fit?”
by August 15, 2022
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