To insert one's penis into any of the three holes on a female up to the balls, so they slap against the our edge of the hole.
Tom: I got balls deep in Mindy at Jennifer's party right there in the kitchen.
Nate: Dang, Tom! I wanna slam her hard. Did you know that your brother got balls deep in her too afterwards when you were drunk?
Tom: That hoe... She had more fun than me!
by Sexy Stripper Queen March 06, 2017
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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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When a male inserts his penis into a partner all the way to the testicles.
"It was great, I was balls deep in this chick."

"Shit dude, my moms walked in while I was balls deep."
by Mary L August 04, 2005
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to insert your penis into the vagina (or other orafice) until your balls rest against the orafice.
by G January 08, 2003
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Paris Hilton takes it ball deep in her porn film!! She deserves an academny award
by fashizzle May 03, 2004
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To thrust one's penis into a women's vagina to a point where pushing the balls in wouldn't make much
of a difference or.... all worth while.
Women: "Ohh, Deeper, Deeper, Harder, Harder!"
Man: "I can't bitch! Im Balls Deep already!!"
by Tommeh Arris January 09, 2009
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Metaphor: the events of being deeply involved with something, this could be your homework; or something which has nothing to do with testicles or the length of orifices.
a. hey man what's happening?
b. im balls deep in my homework right now

a. that party last week was nuts
b. yeah! it was balls deep!

a. hear about that volcano eruption?
b. yeah it totally wreecked my neighborhood
c. eh, I was balls deep in the lava
by HappyDickFarting May 23, 2010
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