bone in one's body off the top of my head old hand, an on bended knee on hand on your (or one's) last legs play it by ear put your (or one's) best foot forward put your finger on something put your foot in your mouth rack your brains rub someone's nose in it running around like a chicken with its head cut...
know not what they do forlorn hope foul play four by two four corners of the earth frailty, thy name is woman freeze the balls off a brass monkey - cold enough to freezing temperatures french phrases friday afternoon car friend in need is a friend indeed - a friends, romans, countrymen, lend me your ears...