2019 · Knee-knocky Noun; A pillow (standard or body pillow) designated for use between one’s legs/knees. “ Ever since she’s gotten pregnant, she refuses to sleep without a knee-knocky .” “ Ugh, I left my knee-knocky at home!” by gonnagetyourgizzard2019 July 2, 2019 Get the Knee-knocky mug. More random definitions.