A feeling of love that feels just like when you go to the ball pit at Chuckie Cheese and sink all the way to the bottom, and nobody can find you. Featured on the Cleveland Show.
"Scottie Pippin, do you know how deep in love I am?"
"How Deep?"
"I'm Talkin' 'bout balls deep, balls deep in love"
In a precarious situation; see "hairy"
My friend in college was dating (may still be) a woman with very hairy eye-brows. I nick-named her "Brows." One early morning, a friend asked where my friend who was dating "Brows" was. He was indeed in bed with her, doing the nasty probably, although we always gave him a hard time about it. I thus simply answered, "Balls-deep in Groucho." From then on it became synonomous with being in a "hairy, tight, or precarious spot"