The act of deeply inserting one's penis into any orifice so that the genitalia (ie: ballz, sack, nuts) touch the opening one is penetrating... ie: anus, vagina, mouth
...get that girl one more drink, and I'll be ballz deep
by bradleyb November 02, 2007
this is a term used when bowling, when you throw a beautiful ball, and you hang a single pin.
Dammit! that shot was Ballzdeep, and i got SCREWED!
by Matt Whiteside January 16, 2008