Balls Deep is a term that was coined by my brother Dan and Im proud to say I use it atleast once a day
Man...That chick I met lastnight, I took her back to my place and went balls deep on that shit till the sun came up.
2) (adj) generally, the act of doing any activity hardcore, all out, and as fully as possible.
A: Balls deep in some slut's filth.
ex 2. We hit the bars balls deep last night- I feel shitty.
2.can be used as an expression for something overwhelming, ridiculous, exaggerated, or to refer to a large number of things. Also as an affirmative when answering a question
"Are you in to go to tijuana tonight? IM BALLS DEEP"