When a woman's breasts sag down very low, as if to her knees.
"Based on the pictures of her teenage years, its rather devastating to see that Grandma now has boobknees."

"My great aunt might break a hip if she trips over her boobknees."
by ThisGirl38 August 21, 2011
Get the Boobknees mug.
A worn referring to how knees poke out from your legs creating a boob-like shape
Haha I just grabbed your boobknees
by Thatveryhotguy April 21, 2021
Get the Boobknees mug.