A device attached to the human body, designed for finding furniture in the dark.

A swimmer

A joint that connects the upper and lower leg. This joint is infamous for one reason: the dreaded arrow. If an arrow hits you in the knee, you will transform into a city guard who endlessly receives reports of sweetroll robberies.

The absolute worst place to be hit with an arrow.

the shorter way of saying on your knees (telling someone to get down on their knees and suck your dick)

It's when you're dancing with a girl, you take your knee and rub it against her crotch/vagina.

Where a girl is only hot enough to give you head. nothing more.