to repair a leaky roof; (dialect) to find fault; to nitpick; (slang) to score a bargain (esp. when the seller is unaware of the item's true value); (slang) to take advantage of an unexpected opportunity

(slang) to target an intoxicated person for sexual assault

to pick up; to gather

bone-gathering, a custom of Fujian and Taiwan in which a son recovers the bones of his deceased father from the grave and places them in an urn for permanent storage at a different location

all is grist that comes to the mill (idiom)