Definition of yard sales:
(n) :
(US) A sale of used household goods held on the seller's own premises.
(n) :
(sports) The state of a skier, snowboarder, skateboarder, cyclist, etc. and their equipment after a severe crash, laid out across the ground like items in a yard sale.
(n) :
(sports, by extension) A notable fall during a sports activity, such as trail running.