A hybridization of the words Gravity and Boobs. What happens to a woman's chest as she reaches middle age and/or has children. Used to describe a woman with a large saggy rack.
My wife was hot when she was younger, but 20 years and three kids on gave her groobs.
by photonerd February 07, 2008
Similar to hangy tits, groobs refer to breasts that hang down unnaturally low to one's torso or beyond. Formed by combining the words GRANNY and BOOBS to form GROOBS. Most commonly found among the elder female population, yet not excluded from the more disproportionate youth of today.
Daaaaaaaamn, Barbara's groobs hang so low they look like she got them on a direct mail order from an old folks home.
by wdfa5150 December 04, 2007