That space under your knee; the scientific name is not known. Generally this area does not grow coarse hair unless you accidentially rub rogaine on it. If such a thing was done, you'd have a hairy knee-pit.
Girl 1-"Ohmygod, I was shaving my legs last night and cut my knee-pit! Now everytime I squat down more blood gushes out D:"
Girl 2-"Yoh at least your older brother didnt wipe rogaine all over it when you were sleeping, my brother did and now I have a hairy knee pit!"
When a male and female are aroused the male takes his enlarged penis and sticks it behind a woman's knee and beats to his own rhythm
Jack and Emily are naked in bed so emily sands up and jack whoops out his fat cock and sticks it behind her knee and moves his torso back and forth and thts knee pit sex
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.
You didn't get any napkins with your takeout pork fried rice? Womp womp.